2101121958 has 32 divisors (see below), whose sum is σ = 4527484416. Its totient is φ = 646214688.

The previous prime is 2101121951. The next prime is 2101121959. The reversal of 2101121958 is 8591211012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101121951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234835 + ... + 243617.

It is an arithmetic number, because the mean of its divisors is an integer number (141483888).

Almost surely, 2^2101121958 is an apocalyptic number.

2101121958 is an abundant number, since it is smaller than the sum of its proper divisors (2426362458).

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

2101121958 is a wasteful number, since it uses less digits than its factorization.

2101121958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11868.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 2101121958 is about 45837.9968803175. The cubic root of 2101121958 is about 1280.8071808994.

The spelling of 2101121958 in words is "two billion, one hundred one million, one hundred twenty-one thousand, nine hundred fifty-eight".