2120312123 has 2 divisors, whose sum is σ = 2120312124. Its totient is φ = 2120312122.

The previous prime is 2120312099. The next prime is 2120312141. The reversal of 2120312123 is 3212130212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2120312123 - 2²⁰ = 2119263547 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120312153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060156061 + 1060156062.

It is an arithmetic number, because the mean of its divisors is an integer number (1060156062).

Almost surely, 2^2120312123 is an apocalyptic number.

2120312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120312123 is an equidigital number, since it uses as much as digits as its factorization.

2120312123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2120312123 is about 46046.8470473278. The cubic root of 2120312123 is about 1284.6946991293.

Adding to 2120312123 its reverse (3212130212), we get a palindrome (5332442335).

The spelling of 2120312123 in words is "two billion, one hundred twenty million, three hundred twelve thousand, one hundred twenty-three".