831055121 has 4 divisors (see below), whose sum is σ = 894982452. Its totient is φ = 767127792.

The previous prime is 831055111. The next prime is 831055129. The reversal of 831055121 is 121550138.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121550138 = 2 ⋅60775069.

It can be written as a sum of positive squares in 2 ways, for example, as 233937025 + 597118096 = 15295^2 + 24436^2 .

It is a cyclic number.

It is not a de Polignac number, because 831055121 - 2¹⁰ = 831054097 is a prime.

It is a super-2 number, since 2×831055121² = 1381305228280649282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (831055129) 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, 31963646 + ... + 31963671.

It is an arithmetic number, because the mean of its divisors is an integer number (223745613).

Almost surely, 2^831055121 is an apocalyptic number.

It is an amenable number.

831055121 is a deficient number, since it is larger than the sum of its proper divisors (63927331).

831055121 is a wasteful number, since it uses less digits than its factorization.

831055121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63927330.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 831055121 is about 28828.0266580978. The cubic root of 831055121 is about 940.1776942629.

The spelling of 831055121 in words is "eight hundred thirty-one million, fifty-five thousand, one hundred twenty-one".