21302121031303 has 4 divisors (see below), whose sum is σ = 24345281178640. Its totient is φ = 18258960883968.

The previous prime is 21302121031297. The next prime is 21302121031307. The reversal of 21302121031303 is 30313012120312.

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

It is not a de Polignac number, because 21302121031303 - 2²⁵ = 21302087476871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302121031307) 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, 1521580073658 + ... + 1521580073671.

It is an arithmetic number, because the mean of its divisors is an integer number (6086320294660).

Almost surely, 2^{21302121031303} is an apocalyptic number.

21302121031303 is a deficient number, since it is larger than the sum of its proper divisors (3043160147337).

21302121031303 is an equidigital number, since it uses as much as digits as its factorization.

21302121031303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043160147336.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21302121031303 its reverse (30313012120312), we get a palindrome (51615133151615).

The spelling of 21302121031303 in words is "twenty-one trillion, three hundred two billion, one hundred twenty-one million, thirty-one thousand, three hundred three".