2131220031120 has 60 divisors (see below), whose sum is σ = 7157347273596. Its totient is φ = 568325341440.

The previous prime is 2131220031113. The next prime is 2131220031121. The reversal of 2131220031120 is 211300221312.

2131220031120 is a `hidden beast` number, since 2 + 1 + 312 + 20 + 0 + 311 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1601631989136 + 529588041984 = 1265556^2 + 727728^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2131220031093 and 2131220031102.

It is not an unprimeable number, because it can be changed into a prime (2131220031121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1480013191 + ... + 1480014630.

Almost surely, 2^{2131220031120} is an apocalyptic number.

2131220031120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131220031120 is an abundant number, since it is smaller than the sum of its proper divisors (5026127242476).

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

2131220031120 is a wasteful number, since it uses less digits than its factorization.

2131220031120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960027840 (or 2960027831 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2131220031120 its reverse (211300221312), we get a palindrome (2342520252432).

The spelling of 2131220031120 in words is "two trillion, one hundred thirty-one billion, two hundred twenty million, thirty-one thousand, one hundred twenty".