2128118231 has 2 divisors, whose sum is σ = 2128118232. Its totient is φ = 2128118230.

The previous prime is 2128118227. The next prime is 2128118261. The reversal of 2128118231 is 1328118212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2128118231 - 2² = 2128118227 is a prime.

It is a super-2 number, since 2×2128118231² = 9057774410229138722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2128118194 and 2128118203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128118261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064059115 + 1064059116.

It is an arithmetic number, because the mean of its divisors is an integer number (1064059116).

Almost surely, 2^2128118231 is an apocalyptic number.

2128118231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128118231 is an equidigital number, since it uses as much as digits as its factorization.

2128118231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 2128118231 is about 46131.5318518690. The cubic root of 2128118231 is about 1286.2693389648.

The spelling of 2128118231 in words is "two billion, one hundred twenty-eight million, one hundred eighteen thousand, two hundred thirty-one".