2101022020 has 12 divisors (see below), whose sum is σ = 4412146284. Its totient is φ = 840408800.

The previous prime is 2101021943. The next prime is 2101022029. The reversal of 2101022020 is 202201012.

It can be written as a sum of positive squares in 2 ways, for example, as 1138657536 + 962364484 = 33744^2 + 31022^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2101021988 and 2101022006.

It is not an unprimeable number, because it can be changed into a prime (2101022029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52525531 + ... + 52525570.

It is an arithmetic number, because the mean of its divisors is an integer number (367678857).

Almost surely, 2^2101022020 is an apocalyptic number.

2101022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101022020 is an abundant number, since it is smaller than the sum of its proper divisors (2311124264).

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

2101022020 is a wasteful number, since it uses less digits than its factorization.

2101022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105051110 (or 105051108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2101022020 is about 45836.9067455473. The cubic root of 2101022020 is about 1280.7868737587.

Adding to 2101022020 its reverse (202201012), we get a palindrome (2303223032).

The spelling of 2101022020 in words is "two billion, one hundred one million, twenty-two thousand, twenty".