20212021120 has 64 divisors (see below), whose sum is σ = 48384352800. Its totient is φ = 8073934848.

The previous prime is 20212021099. The next prime is 20212021133. The reversal of 20212021120 is 2112021202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 20212021120.

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, 463621 + ... + 505339.

Almost surely, 2^20212021120 is an apocalyptic number.

20212021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24192176400).

20212021120 is an abundant number, since it is smaller than the sum of its proper divisors (28172331680).

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

20212021120 is an equidigital number, since it uses as much as digits as its factorization.

20212021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42495 (or 42483 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20212021120 its reverse (2112021202), we get a palindrome (22324042322).

The spelling of 20212021120 in words is "twenty billion, two hundred twelve million, twenty-one thousand, one hundred twenty".