1213100131204 has 24 divisors (see below), whose sum is σ = 2287386120600. Its totient is φ = 559608543744.

The previous prime is 1213100131141. The next prime is 1213100131249. The reversal of 1213100131204 is 4021310013121.

It can be written as a sum of positive squares in 4 ways, for example, as 2765708100 + 1210334423104 = 52590^2 + 1100152^2 .

It is a super-2 number, since 2×1213100131204² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5809429 + ... + 6014620.

It is an arithmetic number, because the mean of its divisors is an integer number (95307755025).

Almost surely, 2^{1213100131204} is an apocalyptic number.

It is an amenable number.

1213100131204 is a deficient number, since it is larger than the sum of its proper divisors (1074285989396).

1213100131204 is a wasteful number, since it uses less digits than its factorization.

1213100131204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11826039 (or 11826037 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1213100131204 its reverse (4021310013121), we get a palindrome (5234410144325).

The spelling of 1213100131204 in words is "one trillion, two hundred thirteen billion, one hundred million, one hundred thirty-one thousand, two hundred four".