221021100001121 has 8 divisors (see below), whose sum is σ = 263577957765504. Its totient is φ = 181209845963520.

The previous prime is 221021100001111. The next prime is 221021100001139. The reversal of 221021100001121 is 121100001120122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221021100001121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221021100001096 and 221021100001105.

It is not an unprimeable number, because it can be changed into a prime (221021100001111) 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, 686400931520 + ... + 686400931841.

It is an arithmetic number, because the mean of its divisors is an integer number (32947244720688).

Almost surely, 2^{221021100001121} is an apocalyptic number.

It is an amenable number.

221021100001121 is a deficient number, since it is larger than the sum of its proper divisors (42556857764383).

221021100001121 is a wasteful number, since it uses less digits than its factorization.

221021100001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372801863391.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221021100001121 its reverse (121100001120122), we get a palindrome (342121101121243).

The spelling of 221021100001121 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred million, one thousand, one hundred twenty-one".