2111120210121 has 16 divisors (see below), whose sum is σ = 3033382556736. Its totient is φ = 1298280701376.

The previous prime is 2111120210117. The next prime is 2111120210131. The reversal of 2111120210121 is 1210120211112.

It is a happy number.

It is not a de Polignac number, because 2111120210121 - 2² = 2111120210117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111120210121.

It is not an unprimeable number, because it can be changed into a prime (2111120210131) 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, 18070135 + ... + 18186588.

It is an arithmetic number, because the mean of its divisors is an integer number (189586409796).

Almost surely, 2^{2111120210121} is an apocalyptic number.

It is an amenable number.

2111120210121 is a deficient number, since it is larger than the sum of its proper divisors (922262346615).

2111120210121 is a wasteful number, since it uses less digits than its factorization.

2111120210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36258232.

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

Adding to 2111120210121 its reverse (1210120211112), we get a palindrome (3321240421233).

Subtracting from 2111120210121 its reverse (1210120211112), we obtain a palindrome (900999999009).

The spelling of 2111120210121 in words is "two trillion, one hundred eleven billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".