131022021120 has 160 divisors (see below), whose sum is σ = 419601143808. Its totient is φ = 34877472768.

The previous prime is 131022021107. The next prime is 131022021127. The reversal of 131022021120 is 21120220131.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131022021120.

It is not an unprimeable number, because it can be changed into a prime (131022021127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4416577 + ... + 4446143.

Almost surely, 2^131022021120 is an apocalyptic number.

131022021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131022021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209800571904).

131022021120 is an abundant number, since it is smaller than the sum of its proper divisors (288579122688).

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

131022021120 is an equidigital number, since it uses as much as digits as its factorization.

131022021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30170 (or 30154 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 131022021120 its reverse (21120220131), we get a palindrome (152142241251).

The spelling of 131022021120 in words is "one hundred thirty-one billion, twenty-two million, twenty-one thousand, one hundred twenty".