2121120111110 has 128 divisors (see below), whose sum is σ = 5235358593024. Its totient is φ = 597287669760.

The previous prime is 2121120111083. The next prime is 2121120111139. The reversal of 2121120111110 is 111110211212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1783787 + ... + 2724726.

It is an arithmetic number, because the mean of its divisors is an integer number (40901239008).

Almost surely, 2^{2121120111110} is an apocalyptic number.

2121120111110 is an abundant number, since it is smaller than the sum of its proper divisors (3114238481914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121120111110 is a wasteful number, since it uses less digits than its factorization.

2121120111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508598.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2121120111110 its reverse (111110211212), we get a palindrome (2232230322322).

The spelling of 2121120111110 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred ten".