201210111211021 has 16 divisors (see below), whose sum is σ = 231313279367808. Its totient is φ = 173232984232000.

The previous prime is 201210111210989. The next prime is 201210111211051. The reversal of 201210111211021 is 120112111012102.

It is not a de Polignac number, because 201210111211021 - 2⁵ = 201210111210989 is a prime.

It is a super-2 number, since 2×201210111211021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201210111210986 and 201210111211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210111211051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3937087726 + ... + 3937138831.

It is an arithmetic number, because the mean of its divisors is an integer number (14457079960488).

Almost surely, 2^{201210111211021} is an apocalyptic number.

It is an amenable number.

201210111211021 is a deficient number, since it is larger than the sum of its proper divisors (30103168156787).

201210111211021 is a wasteful number, since it uses less digits than its factorization.

201210111211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874226692.

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

Adding to 201210111211021 its reverse (120112111012102), we get a palindrome (321322222223123).

The spelling of 201210111211021 in words is "two hundred one trillion, two hundred ten billion, one hundred eleven million, two hundred eleven thousand, twenty-one".