102131231 has 2 divisors, whose sum is σ = 102131232. Its totient is φ = 102131230.

The previous prime is 102131219. The next prime is 102131233. The reversal of 102131231 is 132131201.

It is a strong prime.

It is an emirp because it is prime and its reverse (132131201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102131231 - 2¹⁰ = 102130207 is a prime.

It is a super-2 number, since 2×102131231² = 20861576691150722, which contains 22 as substring.

Together with 102131233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102131233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065615 + 51065616.

It is an arithmetic number, because the mean of its divisors is an integer number (51065616).

Almost surely, 2^102131231 is an apocalyptic number.

102131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

102131231 is an equidigital number, since it uses as much as digits as its factorization.

102131231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 102131231 is about 10105.9997526222. Note that the first 3 decimals coincide. The cubic root of 102131231 is about 467.4331642088.

Adding to 102131231 its reverse (132131201), we get a palindrome (234262432).

The spelling of 102131231 in words is "one hundred two million, one hundred thirty-one thousand, two hundred thirty-one".