1031011200020 has 48 divisors (see below), whose sum is σ = 2170814434320. Its totient is φ = 411320871936.

The previous prime is 1031011200019. The next prime is 1031011200031. The reversal of 1031011200020 is 200021101301.

It can be written as a sum of positive squares in 8 ways, for example, as 31455150736 + 999556049284 = 177356^2 + 999778^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1031011199974 and 1031011200010.

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, 72737654 + ... + 72751826.

It is an arithmetic number, because the mean of its divisors is an integer number (45225300715).

Almost surely, 2^{1031011200020} is an apocalyptic number.

1031011200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031011200020 is an abundant number, since it is smaller than the sum of its proper divisors (1139803234300).

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

1031011200020 is a wasteful number, since it uses less digits than its factorization.

1031011200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23484 (or 23482 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1031011200020 its reverse (200021101301), we get a palindrome (1231032301321).

The spelling of 1031011200020 in words is "one trillion, thirty-one billion, eleven million, two hundred thousand, twenty".