1231003021200 has 120 divisors (see below), whose sum is σ = 3966107396928. Its totient is φ = 326369917440.

The previous prime is 1231003021181. The next prime is 1231003021271. The reversal of 1231003021200 is 21203001321.

It is a tau number, because it is divible by the number of its divisors (120).

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 1231003021200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2757244 + ... + 3172443.

Almost surely, 2^{1231003021200} is an apocalyptic number.

1231003021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231003021200 is an abundant number, since it is smaller than the sum of its proper divisors (2735104375728).

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

1231003021200 is a wasteful number, since it uses less digits than its factorization.

1231003021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5929881 (or 5929870 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1231003021200 its reverse (21203001321), we get a palindrome (1252206022521).

The spelling of 1231003021200 in words is "one trillion, two hundred thirty-one billion, three million, twenty-one thousand, two hundred".