201011222021 has 8 divisors (see below), whose sum is σ = 207961237080. Its totient is φ = 194062446592.

The previous prime is 201011221991. The next prime is 201011222023. The reversal of 201011222021 is 120222110102.

It can be written as a sum of positive squares in 4 ways, for example, as 79758232225 + 121252989796 = 282415^2 + 348214^2 .

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-201011222021 is a prime.

It is a super-2 number, since 2×201011222021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201011221987 and 201011222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011222023) 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, 26201 + ... + 634593.

It is an arithmetic number, because the mean of its divisors is an integer number (25995154635).

Almost surely, 2^201011222021 is an apocalyptic number.

It is an amenable number.

201011222021 is a deficient number, since it is larger than the sum of its proper divisors (6950015059).

201011222021 is a wasteful number, since it uses less digits than its factorization.

201011222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619815.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201011222021 its reverse (120222110102), we get a palindrome (321233332123).

The spelling of 201011222021 in words is "two hundred one billion, eleven million, two hundred twenty-two thousand, twenty-one".