131123153131220 has 24 divisors (see below), whose sum is σ = 279130657490664. Its totient is φ = 51730778221056.

The previous prime is 131123153131193. The next prime is 131123153131259. The reversal of 131123153131220 is 22131351321131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49631405041936 + 81491748089284 = 7044956^2 + 9027278^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44905187969 + ... + 44905190888.

It is an arithmetic number, because the mean of its divisors is an integer number (11630444062111).

Almost surely, 2^{131123153131220} is an apocalyptic number.

131123153131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131123153131220 is an abundant number, since it is smaller than the sum of its proper divisors (148007504359444).

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

131123153131220 is a wasteful number, since it uses less digits than its factorization.

131123153131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89810378939 (or 89810378937 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 131123153131220 in words is "one hundred thirty-one trillion, one hundred twenty-three billion, one hundred fifty-three million, one hundred thirty-one thousand, two hundred twenty".