1303311311021 has 16 divisors (see below), whose sum is σ = 1378589122560. Its totient is φ = 1228714861680.

The previous prime is 1303311310981. The next prime is 1303311311047. The reversal of 1303311311021 is 1201131133031.

It is a cyclic number.

It is not a de Polignac number, because 1303311311021 - 2²⁶ = 1303244202157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1303311310984 and 1303311311002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303311301021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3405080 + ... + 3768446.

It is an arithmetic number, because the mean of its divisors is an integer number (86161820160).

Almost surely, 2^{1303311311021} is an apocalyptic number.

It is an amenable number.

1303311311021 is a deficient number, since it is larger than the sum of its proper divisors (75277811539).

1303311311021 is a wasteful number, since it uses less digits than its factorization.

1303311311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364304.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1303311311021 its reverse (1201131133031), we get a palindrome (2504442444052).

The spelling of 1303311311021 in words is "one trillion, three hundred three billion, three hundred eleven million, three hundred eleven thousand, twenty-one".