210122111121 has 32 divisors (see below), whose sum is σ = 303831951360. Its totient is φ = 128399986944.

The previous prime is 210122111093. The next prime is 210122111141. The reversal of 210122111121 is 121111221012.

It is a happy number.

It is not a de Polignac number, because 210122111121 - 2¹⁰ = 210122110097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210122111121.

It is not an unprimeable number, because it can be changed into a prime (210122111141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5574480 + ... + 5612046.

It is an arithmetic number, because the mean of its divisors is an integer number (9494748480).

Almost surely, 2^210122111121 is an apocalyptic number.

It is an amenable number.

210122111121 is a deficient number, since it is larger than the sum of its proper divisors (93709840239).

210122111121 is a wasteful number, since it uses less digits than its factorization.

210122111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38585.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210122111121 its reverse (121111221012), we get a palindrome (331233332133).

The spelling of 210122111121 in words is "two hundred ten billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twenty-one".