131111130221020 has 48 divisors (see below), whose sum is σ = 280057641433920. Its totient is φ = 51549495399936.

The previous prime is 131111130220997. The next prime is 131111130221051. The reversal of 131111130221020 is 20122031111131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152818200 + ... + 153673759.

It is an arithmetic number, because the mean of its divisors is an integer number (5834534196540).

Almost surely, 2^{131111130221020} is an apocalyptic number.

131111130221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131111130221020 is an abundant number, since it is smaller than the sum of its proper divisors (148946511212900).

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

131111130221020 is a wasteful number, since it uses less digits than its factorization.

131111130221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306492334 (or 306492332 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 131111130221020 its reverse (20122031111131), we get a palindrome (151233161332151).

The spelling of 131111130221020 in words is "one hundred thirty-one trillion, one hundred eleven billion, one hundred thirty million, two hundred twenty-one thousand, twenty".