131211302120 has 32 divisors (see below), whose sum is σ = 295673479200. Its totient is φ = 52404867648.

The previous prime is 131211302107. The next prime is 131211302149. The reversal of 131211302120 is 21203112131.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2462474 + ... + 2515193.

It is an arithmetic number, because the mean of its divisors is an integer number (9239796225).

Almost surely, 2^131211302120 is an apocalyptic number.

131211302120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131211302120 is an abundant number, since it is smaller than the sum of its proper divisors (164462177080).

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

131211302120 is a wasteful number, since it uses less digits than its factorization.

131211302120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978337 (or 4978333 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131211302120 its reverse (21203112131), we get a palindrome (152414414251).

The spelling of 131211302120 in words is "one hundred thirty-one billion, two hundred eleven million, three hundred two thousand, one hundred twenty".