2123100020 has 24 divisors (see below), whose sum is σ = 4525057824. Its totient is φ = 836564256.

The previous prime is 2123100019. The next prime is 2123100041. The reversal of 2123100020 is 200013212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2123099974 and 2123100010.

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, 790862 + ... + 793541.

It is an arithmetic number, because the mean of its divisors is an integer number (188544076).

Almost surely, 2^2123100020 is an apocalyptic number.

2123100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123100020 is an abundant number, since it is smaller than the sum of its proper divisors (2401957804).

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

2123100020 is a wasteful number, since it uses less digits than its factorization.

2123100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584479 (or 1584477 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2123100020 is about 46077.1095013565. The cubic root of 2123100020 is about 1285.2575137338.

Adding to 2123100020 its reverse (200013212), we get a palindrome (2323113232).

The spelling of 2123100020 in words is "two billion, one hundred twenty-three million, one hundred thousand, twenty".