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221000201011021 = 3119313691889561
BaseRepresentation
bin110010001111111110011110…
…011110011111111101001101
31001222111102010222202101222211
4302033332132132133331031
5212431331402424323041
62102010031334310421
764356511000553425
oct6217763636377515
91058442128671884
10221000201011021
1164465728009893
12209533a01b8411
1396412ca38a983
143c80676c91485
151a83ac8145481
hexc8ff9e79ff4d

221000201011021 has 8 divisors (see below), whose sum is σ = 228247380281088. Its totient is φ = 213760405524000.

The previous prime is 221000201011013. The next prime is 221000201011091. The reversal of 221000201011021 is 120110102000122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221000201011021 - 23 = 221000201011013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000201010992 and 221000201011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000201011001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1845884920 + ... + 1846004641.

It is an arithmetic number, because the mean of its divisors is an integer number (28530922535136).

Almost surely, 2221000201011021 is an apocalyptic number.

It is an amenable number.

221000201011021 is a deficient number, since it is larger than the sum of its proper divisors (7247179270067).

221000201011021 is a wasteful number, since it uses less digits than its factorization.

221000201011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691891523.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221000201011021 its reverse (120110102000122), we get a palindrome (341110303011143).

The spelling of 221000201011021 in words is "two hundred twenty-one trillion, two hundred one million, eleven thousand, twenty-one".

Divisors: 1 31 1931 59861 3691889561 114448576391 7129038742291 221000201011021