21310230302 has 4 divisors (see below), whose sum is σ = 31965345456. Its totient is φ = 10655115150.

The previous prime is 21310230241. The next prime is 21310230323. The reversal of 21310230302 is 20303201312.

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

It is a super-2 number, since 2×21310230302² (a number of 21 digits) contains 22 as substring.

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, 5327557574 + ... + 5327557577.

It is an arithmetic number, because the mean of its divisors is an integer number (7991336364).

Almost surely, 2^21310230302 is an apocalyptic number.

21310230302 is a deficient number, since it is larger than the sum of its proper divisors (10655115154).

21310230302 is a wasteful number, since it uses less digits than its factorization.

21310230302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655115153.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21310230302 its reverse (20303201312), we get a palindrome (41613431614).

The spelling of 21310230302 in words is "twenty-one billion, three hundred ten million, two hundred thirty thousand, three hundred two".