21152430120 has 64 divisors (see below), whose sum is σ = 64260576000. Its totient is φ = 5569244928.

The previous prime is 21152430113. The next prime is 21152430127. The reversal of 21152430120 is 2103425112.

It is an interprime number because it is at equal distance from previous prime (21152430113) and next prime (21152430127).

It is not an unprimeable number, because it can be changed into a prime (21152430127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1106155 + ... + 1125114.

It is an arithmetic number, because the mean of its divisors is an integer number (1004071500).

Almost surely, 2^21152430120 is an apocalyptic number.

21152430120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152430120 is an abundant number, since it is smaller than the sum of its proper divisors (43108145880).

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

21152430120 is a wasteful number, since it uses less digits than its factorization.

21152430120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231362 (or 2231358 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21152430120 its reverse (2103425112), we get a palindrome (23255855232).

The spelling of 21152430120 in words is "twenty-one billion, one hundred fifty-two million, four hundred thirty thousand, one hundred twenty".