2121220122111 has 12 divisors (see below), whose sum is σ = 3077724465088. Its totient is φ = 1407805281504.

The previous prime is 2121220122107. The next prime is 2121220122149. The reversal of 2121220122111 is 1112210221212.

2121220122111 is a `hidden beast` number, since 21 + 212 + 201 + 221 + 11 = 666.

It is not a de Polignac number, because 2121220122111 - 2² = 2121220122107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121220122181) 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, 528453430 + ... + 528457443.

Almost surely, 2^{2121220122111} is an apocalyptic number.

2121220122111 is a deficient number, since it is larger than the sum of its proper divisors (956504342977).

2121220122111 is a wasteful number, since it uses less digits than its factorization.

2121220122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056911102 (or 1056911099 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2121220122111 its reverse (1112210221212), we get a palindrome (3233430343323).

The spelling of 2121220122111 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".