201112212110021 has 16 divisors (see below), whose sum is σ = 202662766846848. Its totient is φ = 199564616160000.

The previous prime is 201112212109981. The next prime is 201112212110039. The reversal of 201112212110021 is 120011212211102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201112212110021 is a prime.

It is a super-2 number, since 2×201112212110021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112212110041) 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, 756647870 + ... + 756913616.

It is an arithmetic number, because the mean of its divisors is an integer number (12666422927928).

Almost surely, 2^{201112212110021} is an apocalyptic number.

It is an amenable number.

201112212110021 is a deficient number, since it is larger than the sum of its proper divisors (1550554736827).

201112212110021 is a wasteful number, since it uses less digits than its factorization.

201112212110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271292.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201112212110021 its reverse (120011212211102), we get a palindrome (321123424321123).

The spelling of 201112212110021 in words is "two hundred one trillion, one hundred twelve billion, two hundred twelve million, one hundred ten thousand, twenty-one".