102131131 has 2 divisors, whose sum is σ = 102131132. Its totient is φ = 102131130.

The previous prime is 102131119. The next prime is 102131177. The reversal of 102131131 is 131131201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102131131 - 2¹³ = 102122939 is a prime.

It is a super-2 number, since 2×102131131² = 20861535838678322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102131111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065565 + 51065566.

It is an arithmetic number, because the mean of its divisors is an integer number (51065566).

Almost surely, 2^102131131 is an apocalyptic number.

102131131 is a deficient number, since it is larger than the sum of its proper divisors (1).

102131131 is an equidigital number, since it uses as much as digits as its factorization.

102131131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 102131131 is about 10105.9948050650. The cubic root of 102131131 is about 467.4330116490.

Adding to 102131131 its reverse (131131201), we get a palindrome (233262332).

The spelling of 102131131 in words is "one hundred two million, one hundred thirty-one thousand, one hundred thirty-one".