2120998860 has 36 divisors (see below), whose sum is σ = 6433697088. Its totient is φ = 565599648.

The previous prime is 2120998819. The next prime is 2120998871. The reversal of 2120998860 is 688990212.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5891484 + ... + 5891843.

It is an arithmetic number, because the mean of its divisors is an integer number (178713808).

Almost surely, 2^2120998860 is an apocalyptic number.

2120998860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120998860 is an abundant number, since it is smaller than the sum of its proper divisors (4312698228).

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

2120998860 is a wasteful number, since it uses less digits than its factorization.

2120998860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11783342 (or 11783337 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 2120998860 is about 46054.3033819859. The cubic root of 2120998860 is about 1284.8333818798.

The spelling of 2120998860 in words is "two billion, one hundred twenty million, nine hundred ninety-eight thousand, eight hundred sixty".