131211322004 has 48 divisors (see below), whose sum is σ = 264196867200. Its totient is φ = 55853870976.

The previous prime is 131211321961. The next prime is 131211322009. The reversal of 131211322004 is 400223112131.

It is a super-2 number, since 2×131211322004² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211322009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5165567 + ... + 5190905.

It is an arithmetic number, because the mean of its divisors is an integer number (5504101400).

Almost surely, 2^131211322004 is an apocalyptic number.

131211322004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131211322004 is an abundant number, since it is smaller than the sum of its proper divisors (132985545196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131211322004 is a wasteful number, since it uses less digits than its factorization.

131211322004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26592 (or 26590 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131211322004 its reverse (400223112131), we get a palindrome (531434434135).

The spelling of 131211322004 in words is "one hundred thirty-one billion, two hundred eleven million, three hundred twenty-two thousand, four".