131311232011220 has 24 divisors (see below), whose sum is σ = 275754735136608. Its totient is φ = 52524274154400.

The previous prime is 131311232011213. The next prime is 131311232011229. The reversal of 131311232011220 is 22110232113131.

It is a happy number.

131311232011220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×131311232011220³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131311232011229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8697026 + ... + 18391865.

It is an arithmetic number, because the mean of its divisors is an integer number (11489780630692).

Almost surely, 2^{131311232011220} is an apocalyptic number.

131311232011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131311232011220 is an abundant number, since it is smaller than the sum of its proper divisors (144443503125388).

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

131311232011220 is a wasteful number, since it uses less digits than its factorization.

131311232011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27331271 (or 27331269 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 131311232011220 its reverse (22110232113131), we get a palindrome (153421464124351).

The spelling of 131311232011220 in words is "one hundred thirty-one trillion, three hundred eleven billion, two hundred thirty-two million, eleven thousand, two hundred twenty".