131210999 has 2 divisors, whose sum is σ = 131211000. Its totient is φ = 131210998.

The previous prime is 131210977. The next prime is 131211007. The reversal of 131210999 is 999012131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131210999 - 2²⁰ = 130162423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131210899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605499 + 65605500.

It is an arithmetic number, because the mean of its divisors is an integer number (65605500).

Almost surely, 2^131210999 is an apocalyptic number.

131210999 is a deficient number, since it is larger than the sum of its proper divisors (1).

131210999 is an equidigital number, since it uses as much as digits as its factorization.

131210999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 131210999 is about 11454.7369677352. The cubic root of 131210999 is about 508.1478363105.

The spelling of 131210999 in words is "one hundred thirty-one million, two hundred ten thousand, nine hundred ninety-nine".