1231003011020 has 48 divisors (see below), whose sum is σ = 2588132271648. Its totient is φ = 491825157120.

The previous prime is 1231003010987. The next prime is 1231003011031. The reversal of 1231003011020 is 201103001321.

It is a junction number, because it is equal to n+sod(n) for n = 1231003010986 and 1231003011004.

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, 77059754 + ... + 77075726.

It is an arithmetic number, because the mean of its divisors is an integer number (53919422326).

Almost surely, 2^{1231003011020} is an apocalyptic number.

1231003011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231003011020 is an abundant number, since it is smaller than the sum of its proper divisors (1357129260628).

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

1231003011020 is a wasteful number, since it uses less digits than its factorization.

1231003011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20250 (or 20248 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 1231003011020 its reverse (201103001321), we get a palindrome (1432106012341).

It can be divided in two parts, 123100301 and 1020, that added together give a palindrome (123101321).

The spelling of 1231003011020 in words is "one trillion, two hundred thirty-one billion, three million, eleven thousand, twenty".