20102021120 has 64 divisors (see below), whose sum is σ = 48244507740. Its totient is φ = 8040742912.

The previous prime is 20102021113. The next prime is 20102021143. The reversal of 20102021120 is 2112020102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16680239104 + 3421782016 = 129152^2 + 58496^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102494 + ... + 225186.

Almost surely, 2^20102021120 is an apocalyptic number.

20102021120 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 20102021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24122253870).

20102021120 is an abundant number, since it is smaller than the sum of its proper divisors (28142486620).

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

20102021120 is an frugal number, since it uses more digits than its factorization.

20102021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122728 (or 122700 counting only the distinct ones).

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

Adding to 20102021120 its reverse (2112020102), we get a palindrome (22214041222).

The spelling of 20102021120 in words is "twenty billion, one hundred two million, twenty-one thousand, one hundred twenty".