2111210021121 has 8 divisors (see below), whose sum is σ = 2816985039744. Its totient is φ = 1406454174960.

The previous prime is 2111210021111. The next prime is 2111210021147. The reversal of 2111210021121 is 1211200121112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111210021121 - 2⁶ = 2111210021057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111210021121.

It is not an unprimeable number, because it can be changed into a prime (2111210021111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254788281 + ... + 254796566.

It is an arithmetic number, because the mean of its divisors is an integer number (352123129968).

Almost surely, 2^{2111210021121} is an apocalyptic number.

It is an amenable number.

2111210021121 is a deficient number, since it is larger than the sum of its proper divisors (705775018623).

2111210021121 is a wasteful number, since it uses less digits than its factorization.

2111210021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509586231.

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

Adding to 2111210021121 its reverse (1211200121112), we get a palindrome (3322410142233).

Subtracting from 2111210021121 its reverse (1211200121112), we obtain a palindrome (900009900009).

The spelling of 2111210021121 in words is "two trillion, one hundred eleven billion, two hundred ten million, twenty-one thousand, one hundred twenty-one".