2021112012111 has 32 divisors (see below), whose sum is σ = 2895322859520. Its totient is φ = 1251255600000.

The previous prime is 2021112012103. The next prime is 2021112012209. The reversal of 2021112012111 is 1112102111202.

It is a happy number.

It is not a de Polignac number, because 2021112012111 - 2³ = 2021112012103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021112012611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1859140 + ... + 2738361.

It is an arithmetic number, because the mean of its divisors is an integer number (90478839360).

Almost surely, 2^{2021112012111} is an apocalyptic number.

2021112012111 is a deficient number, since it is larger than the sum of its proper divisors (874210847409).

2021112012111 is a wasteful number, since it uses less digits than its factorization.

2021112012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597727.

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

Adding to 2021112012111 its reverse (1112102111202), we get a palindrome (3133214123313).

Subtracting from 2021112012111 its reverse (1112102111202), we obtain a palindrome (909009900909).

The spelling of 2021112012111 in words is "two trillion, twenty-one billion, one hundred twelve million, twelve thousand, one hundred eleven".