1231415500213 has 4 divisors (see below), whose sum is σ = 1254649754988. Its totient is φ = 1208181245440.

The previous prime is 1231415500199. The next prime is 1231415500219. The reversal of 1231415500213 is 3120055141321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 790575274449 + 440840225764 = 889143^2 + 663958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231415500213 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 (1231415500219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11617127308 + ... + 11617127413.

It is an arithmetic number, because the mean of its divisors is an integer number (313662438747).

Almost surely, 2^{1231415500213} is an apocalyptic number.

It is an amenable number.

1231415500213 is a deficient number, since it is larger than the sum of its proper divisors (23234254775).

1231415500213 is an equidigital number, since it uses as much as digits as its factorization.

1231415500213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23234254774.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 1231415500213 in words is "one trillion, two hundred thirty-one billion, four hundred fifteen million, five hundred thousand, two hundred thirteen".