210220112121 has 32 divisors (see below), whose sum is σ = 287489218560. Its totient is φ = 136575844416.

The previous prime is 210220112093. The next prime is 210220112173. The reversal of 210220112121 is 121211022012.

It is not a de Polignac number, because 210220112121 - 2⁷ = 210220111993 is a prime.

It is a super-2 number, since 2×210220112121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210220112121.

It is not an unprimeable number, because it can be changed into a prime (210220112621) 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, 34646730 + ... + 34652796.

It is an arithmetic number, because the mean of its divisors is an integer number (8984038080).

Almost surely, 2^210220112121 is an apocalyptic number.

It is an amenable number.

210220112121 is a deficient number, since it is larger than the sum of its proper divisors (77269106439).

210220112121 is a wasteful number, since it uses less digits than its factorization.

210220112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7133.

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

Adding to 210220112121 its reverse (121211022012), we get a palindrome (331431134133).

The spelling of 210220112121 in words is "two hundred ten billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-one".