21233012120 has 32 divisors (see below), whose sum is σ = 49851421920. Its totient is φ = 8123934720.

The previous prime is 21233012027. The next prime is 21233012131. The reversal of 21233012120 is 2121033212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11538761 + ... + 11540600.

It is an arithmetic number, because the mean of its divisors is an integer number (1557856935).

Almost surely, 2^21233012120 is an apocalyptic number.

21233012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233012120 is an abundant number, since it is smaller than the sum of its proper divisors (28618409800).

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

21233012120 is a wasteful number, since it uses less digits than its factorization.

21233012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23079395 (or 23079391 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21233012120 its reverse (2121033212), we get a palindrome (23354045332).

The spelling of 21233012120 in words is "twenty-one billion, two hundred thirty-three million, twelve thousand, one hundred twenty".