2121974923 has 8 divisors (see below), whose sum is σ = 2135660688. Its totient is φ = 2108305824.

The previous prime is 2121974903. The next prime is 2121974947. The reversal of 2121974923 is 3294791212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121974923 - 2¹³ = 2121966731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121974903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340665 + ... + 346837.

It is an arithmetic number, because the mean of its divisors is an integer number (266957586).

Almost surely, 2^2121974923 is an apocalyptic number.

2121974923 is a deficient number, since it is larger than the sum of its proper divisors (13685765).

2121974923 is a wasteful number, since it uses less digits than its factorization.

2121974923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333.

The product of its digits is 54432, while the sum is 40.

The square root of 2121974923 is about 46064.8990338631. The cubic root of 2121974923 is about 1285.0304409207.

The spelling of 2121974923 in words is "two billion, one hundred twenty-one million, nine hundred seventy-four thousand, nine hundred twenty-three".