21232420120 has 32 divisors (see below), whose sum is σ = 47909862000. Its totient is φ = 8468627328.

The previous prime is 21232420117. The next prime is 21232420127. The reversal of 21232420120 is 2102423212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232420127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746514 + ... + 774433.

Almost surely, 2^21232420120 is an apocalyptic number.

21232420120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21232420120 is an abundant number, since it is smaller than the sum of its proper divisors (26677441880).

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

21232420120 is a wasteful number, since it uses less digits than its factorization.

21232420120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521307 (or 1521303 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21232420120 its reverse (2102423212), we get a palindrome (23334843332).

The spelling of 21232420120 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty thousand, one hundred twenty".