2120999958 has 64 divisors (see below), whose sum is σ = 5876375040. Its totient is φ = 550908000.

The previous prime is 2120999957. The next prime is 2120999977. The reversal of 2120999958 is 8599990212.

It is a super-4 number, since 4×2120999958⁴ (a number of 38 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120999953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250893 + ... + 259208.

It is an arithmetic number, because the mean of its divisors is an integer number (91818360).

Almost surely, 2^2120999958 is an apocalyptic number.

2120999958 is an abundant number, since it is smaller than the sum of its proper divisors (3755375082).

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

2120999958 is a wasteful number, since it uses less digits than its factorization.

2120999958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510130 (or 510124 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 2120999958 is about 46054.3153026945. The cubic root of 2120999958 is about 1284.8336035909.

The spelling of 2120999958 in words is "two billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred fifty-eight".