20210021120 has 72 divisors (see below), whose sum is σ = 50078694960. Its totient is φ = 7805235200.

The previous prime is 20210021059. The next prime is 20210021131. The reversal of 20210021120 is 2112001202.

It is a happy 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, 235106 + ... + 309345.

It is an arithmetic number, because the mean of its divisors is an integer number (695537430).

Almost surely, 2^20210021120 is an apocalyptic number.

20210021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210021120 is an abundant number, since it is smaller than the sum of its proper divisors (29868673840).

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

20210021120 is an equidigital number, since it uses as much as digits as its factorization.

20210021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544501 (or 544487 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20210021120 its reverse (2112001202), we get a palindrome (22322022322).

The spelling of 20210021120 in words is "twenty billion, two hundred ten million, twenty-one thousand, one hundred twenty".