21311302320302 has 4 divisors (see below), whose sum is σ = 31966953480456. Its totient is φ = 10655651160150.

The previous prime is 21311302320221. The next prime is 21311302320359. The reversal of 21311302320302 is 20302320311312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5327825580074 + ... + 5327825580077.

It is an arithmetic number, because the mean of its divisors is an integer number (7991738370114).

Almost surely, 2^{21311302320302} is an apocalyptic number.

21311302320302 is a deficient number, since it is larger than the sum of its proper divisors (10655651160154).

21311302320302 is a wasteful number, since it uses less digits than its factorization.

21311302320302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655651160153.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21311302320302 its reverse (20302320311312), we get a palindrome (41613622631614).

The spelling of 21311302320302 in words is "twenty-one trillion, three hundred eleven billion, three hundred two million, three hundred twenty thousand, three hundred two".