2120120100 has 108 divisors (see below), whose sum is σ = 7594763904. Its totient is φ = 484597440.

The previous prime is 2120120071. The next prime is 2120120147. The reversal of 2120120100 is 10210212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 161964 + ... + 174563.

It is an arithmetic number, because the mean of its divisors is an integer number (70321888).

Almost surely, 2^2120120100 is an apocalyptic number.

2120120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120120100 is an abundant number, since it is smaller than the sum of its proper divisors (5474643804).

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

2120120100 is a wasteful number, since it uses less digits than its factorization.

2120120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336554 (or 336544 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2120120100 is about 46044.7619170737. The cubic root of 2120120100 is about 1284.6559157862.

Adding to 2120120100 its reverse (10210212), we get a palindrome (2130330312).

The spelling of 2120120100 in words is "two billion, one hundred twenty million, one hundred twenty thousand, one hundred".