2157123216031 has 8 divisors (see below), whose sum is σ = 2610300362400. Its totient is φ = 1740200241408.

The previous prime is 2157123216011. The next prime is 2157123216037. The reversal of 2157123216031 is 1306123217512.

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 2157123216031 - 2²⁹ = 2156586345119 is a prime.

It is a super-2 number, since 2×2157123216031² (a number of 25 digits) 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 (2157123216037) 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, 9063542806 + ... + 9063543043.

It is an arithmetic number, because the mean of its divisors is an integer number (326287545300).

Almost surely, 2^{2157123216031} is an apocalyptic number.

2157123216031 is a deficient number, since it is larger than the sum of its proper divisors (453177146369).

2157123216031 is a wasteful number, since it uses less digits than its factorization.

2157123216031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18127085873.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 2157123216031 in words is "two trillion, one hundred fifty-seven billion, one hundred twenty-three million, two hundred sixteen thousand, thirty-one".