202111112131 has 2 divisors, whose sum is σ = 202111112132. Its totient is φ = 202111112130.

The previous prime is 202111112129. The next prime is 202111112143. The reversal of 202111112131 is 131211111202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202111112131 - 2¹ = 202111112129 is a prime.

It is a super-2 number, since 2×202111112131² (a number of 23 digits) contains 22 as substring.

Together with 202111112129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (202111112101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055556065 + 101055556066.

It is an arithmetic number, because the mean of its divisors is an integer number (101055556066).

Almost surely, 2^202111112131 is an apocalyptic number.

202111112131 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111112131 is an equidigital number, since it uses as much as digits as its factorization.

202111112131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 202111112131 its reverse (131211111202), we get a palindrome (333322223333).

The spelling of 202111112131 in words is "two hundred two billion, one hundred eleven million, one hundred twelve thousand, one hundred thirty-one".