1200020321031 has 64 divisors (see below), whose sum is σ = 1861856575488. Its totient is φ = 673366503168.

The previous prime is 1200020321011. The next prime is 1200020321039. The reversal of 1200020321031 is 1301230200021.

It is not a de Polignac number, because 1200020321031 - 2³⁸ = 925142414087 is a prime.

It is a super-2 number, since 2×1200020321031² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200020321031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200020321039) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 262756710 + ... + 262761276.

It is an arithmetic number, because the mean of its divisors is an integer number (29091508992).

Almost surely, 2^{1200020321031} is an apocalyptic number.

1200020321031 is a deficient number, since it is larger than the sum of its proper divisors (661836254457).

1200020321031 is a wasteful number, since it uses less digits than its factorization.

1200020321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540.

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

Adding to 1200020321031 its reverse (1301230200021), we get a palindrome (2501250521052).

The spelling of 1200020321031 in words is "one trillion, two hundred billion, twenty million, three hundred twenty-one thousand, thirty-one".