1213000202131 has 4 divisors (see below), whose sum is σ = 1225505358952. Its totient is φ = 1200495045312.

The previous prime is 1213000202107. The next prime is 1213000202177. The reversal of 1213000202131 is 1312020003121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213000202131 is a prime.

It is a super-2 number, since 2×1213000202131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213000202231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6252578265 + ... + 6252578458.

It is an arithmetic number, because the mean of its divisors is an integer number (306376339738).

Almost surely, 2^{1213000202131} is an apocalyptic number.

1213000202131 is a deficient number, since it is larger than the sum of its proper divisors (12505156821).

1213000202131 is an equidigital number, since it uses as much as digits as its factorization.

1213000202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12505156820.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1213000202131 its reverse (1312020003121), we get a palindrome (2525020205252).

The spelling of 1213000202131 in words is "one trillion, two hundred thirteen billion, two hundred two thousand, one hundred thirty-one".