2121587423 has 16 divisors (see below), whose sum is σ = 2254003200. Its totient is φ = 1993860960.

The previous prime is 2121587417. The next prime is 2121587467. The reversal of 2121587423 is 3247851212.

It is a cyclic number.

It is not a de Polignac number, because 2121587423 - 2⁴ = 2121587407 is a prime.

It is a super-2 number, since 2×2121587423² = 9002266386863561858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121587123) 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, 156140 + ... + 169182.

It is an arithmetic number, because the mean of its divisors is an integer number (140875200).

Almost surely, 2^2121587423 is an apocalyptic number.

2121587423 is a deficient number, since it is larger than the sum of its proper divisors (132415777).

2121587423 is a wasteful number, since it uses less digits than its factorization.

2121587423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13222.

The product of its digits is 26880, while the sum is 35.

The square root of 2121587423 is about 46060.6928193661. The cubic root of 2121587423 is about 1284.9522151125.

The spelling of 2121587423 in words is "two billion, one hundred twenty-one million, five hundred eighty-seven thousand, four hundred twenty-three".