21302012120 has 32 divisors (see below), whose sum is σ = 50013421920. Its totient is φ = 8150334720.

The previous prime is 21302012063. The next prime is 21302012131. The reversal of 21302012120 is 2121020312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21302012095 and 21302012104.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 11576261 + ... + 11578100.

It is an arithmetic number, because the mean of its divisors is an integer number (1562919435).

Almost surely, 2^21302012120 is an apocalyptic number.

21302012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302012120 is an abundant number, since it is smaller than the sum of its proper divisors (28711409800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302012120 is a wasteful number, since it uses less digits than its factorization.

21302012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23154395 (or 23154391 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21302012120 its reverse (2121020312), we get a palindrome (23423032432).

The spelling of 21302012120 in words is "twenty-one billion, three hundred two million, twelve thousand, one hundred twenty".