2124129257 has 4 divisors (see below), whose sum is σ = 2126711040. Its totient is φ = 2121547476.

The previous prime is 2124129247. The next prime is 2124129307. The reversal of 2124129257 is 7529214212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2124129257 - 2⁸ = 2124129001 is a prime.

It is a super-3 number, since 3×2124129257³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124129247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289657 + ... + 1291302.

It is an arithmetic number, because the mean of its divisors is an integer number (531677760).

Almost surely, 2^2124129257 is an apocalyptic number.

It is an amenable number.

2124129257 is a deficient number, since it is larger than the sum of its proper divisors (2581783).

2124129257 is an equidigital number, since it uses as much as digits as its factorization.

2124129257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581782.

The product of its digits is 20160, while the sum is 35.

The square root of 2124129257 is about 46088.2767848832. The cubic root of 2124129257 is about 1285.4651693429.

The spelling of 2124129257 in words is "two billion, one hundred twenty-four million, one hundred twenty-nine thousand, two hundred fifty-seven".