2131231102220 has 48 divisors (see below), whose sum is σ = 4883089881600. Its totient is φ = 774892624320.

The previous prime is 2131231102219. The next prime is 2131231102229. The reversal of 2131231102220 is 222011321312.

It is a super-2 number, since 2×2131231102220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2131231102192 and 2131231102201.

It is not an unprimeable number, because it can be changed into a prime (2131231102229) 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, 1082711 + ... + 2331249.

It is an arithmetic number, because the mean of its divisors is an integer number (101731039200).

Almost surely, 2^{2131231102220} is an apocalyptic number.

2131231102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131231102220 is an abundant number, since it is smaller than the sum of its proper divisors (2751858779380).

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

2131231102220 is a wasteful number, since it uses less digits than its factorization.

2131231102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256318 (or 1256316 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2131231102220 its reverse (222011321312), we get a palindrome (2353242423532).

The spelling of 2131231102220 in words is "two trillion, one hundred thirty-one billion, two hundred thirty-one million, one hundred two thousand, two hundred twenty".