131102231209 has 2 divisors, whose sum is σ = 131102231210. Its totient is φ = 131102231208.

The previous prime is 131102231149. The next prime is 131102231213. The reversal of 131102231209 is 902132201131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112763654809 + 18338576400 = 335803^2 + 135420^2 .

It is a cyclic number.

It is not a de Polignac number, because 131102231209 - 2¹⁵ = 131102198441 is a prime.

It is not a weakly prime, because it can be changed into another prime (131102234209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65551115604 + 65551115605.

It is an arithmetic number, because the mean of its divisors is an integer number (65551115605).

Almost surely, 2^131102231209 is an apocalyptic number.

It is an amenable number.

131102231209 is a deficient number, since it is larger than the sum of its proper divisors (1).

131102231209 is an equidigital number, since it uses as much as digits as its factorization.

131102231209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 131102231209 in words is "one hundred thirty-one billion, one hundred two million, two hundred thirty-one thousand, two hundred nine".