102131323213 has 4 divisors (see below), whose sum is σ = 102196501120. Its totient is φ = 102066145308.

The previous prime is 102131323187. The next prime is 102131323271. The reversal of 102131323213 is 312323131201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312323131201 = 5501 ⋅56775701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102131323213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102131323013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32586603 + ... + 32589736.

It is an arithmetic number, because the mean of its divisors is an integer number (25549125280).

Almost surely, 2^102131323213 is an apocalyptic number.

It is an amenable number.

102131323213 is a deficient number, since it is larger than the sum of its proper divisors (65177907).

102131323213 is an equidigital number, since it uses as much as digits as its factorization.

102131323213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65177906.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 102131323213 its reverse (312323131201), we get a palindrome (414454454414).

The spelling of 102131323213 in words is "one hundred two billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred thirteen".