21302120234 has 8 divisors (see below), whose sum is σ = 31959754848. Its totient is φ = 10648868620.

The previous prime is 21302120207. The next prime is 21302120251. The reversal of 21302120234 is 43202120312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083572 + ... + 1103055.

It is an arithmetic number, because the mean of its divisors is an integer number (3994969356).

Almost surely, 2^21302120234 is an apocalyptic number.

21302120234 is a deficient number, since it is larger than the sum of its proper divisors (10657634614).

21302120234 is a wasteful number, since it uses less digits than its factorization.

21302120234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191500.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21302120234 its reverse (43202120312), we get a palindrome (64504240546).

The spelling of 21302120234 in words is "twenty-one billion, three hundred two million, one hundred twenty thousand, two hundred thirty-four".