1311301233021 has 32 divisors (see below), whose sum is σ = 1921576220928. Its totient is φ = 790521338880.

The previous prime is 1311301232981. The next prime is 1311301233043. The reversal of 1311301233021 is 1203321031131.

It is a happy number.

It is not a de Polignac number, because 1311301233021 - 2¹⁹ = 1311300708733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311301233091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1073436 + ... + 1942901.

It is an arithmetic number, because the mean of its divisors is an integer number (60049256904).

Almost surely, 2^{1311301233021} is an apocalyptic number.

It is an amenable number.

1311301233021 is a deficient number, since it is larger than the sum of its proper divisors (610274987907).

1311301233021 is a wasteful number, since it uses less digits than its factorization.

1311301233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016581.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1311301233021 its reverse (1203321031131), we get a palindrome (2514622264152).

The spelling of 1311301233021 in words is "one trillion, three hundred eleven billion, three hundred one million, two hundred thirty-three thousand, twenty-one".