21244210120 has 32 divisors (see below), whose sum is σ = 54627969600. Its totient is φ = 7283729088.

The previous prime is 21244210103. The next prime is 21244210177. The reversal of 21244210120 is 2101244212.

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, 37935810 + ... + 37936369.

It is an arithmetic number, because the mean of its divisors is an integer number (1707124050).

Almost surely, 2^21244210120 is an apocalyptic number.

21244210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21244210120 is an abundant number, since it is smaller than the sum of its proper divisors (33383759480).

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

21244210120 is a wasteful number, since it uses less digits than its factorization.

21244210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75872197 (or 75872193 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21244210120 its reverse (2101244212), we get a palindrome (23345454332).

The spelling of 21244210120 in words is "twenty-one billion, two hundred forty-four million, two hundred ten thousand, one hundred twenty".