210120111022121 has 12 divisors (see below), whose sum is σ = 223233691660080. Its totient is φ = 197736612463680.

The previous prime is 210120111022049. The next prime is 210120111022123. The reversal of 210120111022121 is 121220111021012.

210120111022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210120111022121 - 2¹⁴ = 210120111005737 is a prime.

It is a super-2 number, since 2×210120111022121² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210120111022121.

It is not an unprimeable number, because it can be changed into a prime (210120111022123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40746575 + ... + 45612756.

It is an arithmetic number, because the mean of its divisors is an integer number (18602807638340).

Almost surely, 2^{210120111022121} is an apocalyptic number.

It is an amenable number.

210120111022121 is a deficient number, since it is larger than the sum of its proper divisors (13113580637959).

210120111022121 is an equidigital number, since it uses as much as digits as its factorization.

210120111022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86367784 (or 86367767 counting only the distinct ones).

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

Adding to 210120111022121 its reverse (121220111021012), we get a palindrome (331340222043133).

The spelling of 210120111022121 in words is "two hundred ten trillion, one hundred twenty billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".