2101122020 has 12 divisors (see below), whose sum is σ = 4412356284. Its totient is φ = 840448800.

The previous prime is 2101122017. The next prime is 2101122031. The reversal of 2101122020 is 202211012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1356596224 + 744525796 = 36832^2 + 27286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2101121992 and 2101122010.

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, 52528031 + ... + 52528070.

It is an arithmetic number, because the mean of its divisors is an integer number (367696357).

Almost surely, 2^2101122020 is an apocalyptic number.

2101122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101122020 is an abundant number, since it is smaller than the sum of its proper divisors (2311234264).

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

2101122020 is a wasteful number, since it uses less digits than its factorization.

2101122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105056110 (or 105056108 counting only the distinct ones).

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

The square root of 2101122020 is about 45837.9975566124. The cubic root of 2101122020 is about 1280.8071934974.

Adding to 2101122020 its reverse (202211012), we get a palindrome (2303333032).

The spelling of 2101122020 in words is "two billion, one hundred one million, one hundred twenty-two thousand, twenty".