210112220121 has 16 divisors (see below), whose sum is σ = 281601669888. Its totient is φ = 139348944000.

The previous prime is 210112220113. The next prime is 210112220179. The reversal of 210112220121 is 121022211012.

It is not a de Polignac number, because 210112220121 - 2³ = 210112220113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210112220121.

It is not an unprimeable number, because it can be changed into a prime (210112220921) 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, 10273776 + ... + 10294206.

It is an arithmetic number, because the mean of its divisors is an integer number (17600104368).

Almost surely, 2^210112220121 is an apocalyptic number.

It is an amenable number.

210112220121 is a deficient number, since it is larger than the sum of its proper divisors (71489449767).

210112220121 is a wasteful number, since it uses less digits than its factorization.

210112220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38032.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210112220121 its reverse (121022211012), we get a palindrome (331134431133).

The spelling of 210112220121 in words is "two hundred ten billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-one".