2123120231 has 2 divisors, whose sum is σ = 2123120232. Its totient is φ = 2123120230.

The previous prime is 2123120201. The next prime is 2123120243. The reversal of 2123120231 is 1320213212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123120231 - 2¹⁴ = 2123103847 is a prime.

It is a super-2 number, since 2×2123120231² = 9015279030562986722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123120201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061560115 + 1061560116.

It is an arithmetic number, because the mean of its divisors is an integer number (1061560116).

Almost surely, 2^2123120231 is an apocalyptic number.

2123120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123120231 is an equidigital number, since it uses as much as digits as its factorization.

2123120231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2123120231 is about 46077.3288179773. The cubic root of 2123120231 is about 1285.2615920873.

Adding to 2123120231 its reverse (1320213212), we get a palindrome (3443333443).

The spelling of 2123120231 in words is "two billion, one hundred twenty-three million, one hundred twenty thousand, two hundred thirty-one".