1200020311331 has 4 divisors (see below), whose sum is σ = 1204260666072. Its totient is φ = 1195779956592.

The previous prime is 1200020311297. The next prime is 1200020311337. The reversal of 1200020311331 is 1331130200021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200020311331 - 2⁶ = 1200020311267 is a prime.

It is a super-2 number, since 2×1200020311331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200020311337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120176946 + ... + 2120177511.

It is an arithmetic number, because the mean of its divisors is an integer number (301065166518).

Almost surely, 2^{1200020311331} is an apocalyptic number.

1200020311331 is a deficient number, since it is larger than the sum of its proper divisors (4240354741).

1200020311331 is an equidigital number, since it uses as much as digits as its factorization.

1200020311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240354740.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1200020311331 its reverse (1331130200021), we get a palindrome (2531150511352).

The spelling of 1200020311331 in words is "one trillion, two hundred billion, twenty million, three hundred eleven thousand, three hundred thirty-one".