2120111120121 has 8 divisors (see below), whose sum is σ = 2826823411104. Its totient is φ = 1413403121280.

The previous prime is 2120111120089. The next prime is 2120111120123. The reversal of 2120111120121 is 1210211110212.

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 2120111120121 - 2⁵ = 2120111120089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120111120121.

It is not an unprimeable number, because it can be changed into a prime (2120111120123) 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, 348586 + ... + 2088476.

It is an arithmetic number, because the mean of its divisors is an integer number (353352926388).

Almost surely, 2^{2120111120121} is an apocalyptic number.

It is an amenable number.

2120111120121 is a deficient number, since it is larger than the sum of its proper divisors (706712290983).

2120111120121 is a wasteful number, since it uses less digits than its factorization.

2120111120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146071.

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

Adding to 2120111120121 its reverse (1210211110212), we get a palindrome (3330322230333).

Subtracting from 2120111120121 its reverse (1210211110212), we obtain a palindrome (909900009909).

The spelling of 2120111120121 in words is "two trillion, one hundred twenty billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-one".