2123115251 has 2 divisors, whose sum is σ = 2123115252. Its totient is φ = 2123115250.

The previous prime is 2123115199. The next prime is 2123115263. The reversal of 2123115251 is 1525113212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123115251 - 2¹⁸ = 2122853107 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123114251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061557625 + 1061557626.

It is an arithmetic number, because the mean of its divisors is an integer number (1061557626).

Almost surely, 2^2123115251 is an apocalyptic number.

2123115251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123115251 is an equidigital number, since it uses as much as digits as its factorization.

2123115251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 2123115251 is about 46077.2747783547. The cubic root of 2123115251 is about 1285.2605871814.

Adding to 2123115251 its reverse (1525113212), we get a palindrome (3648228463).

The spelling of 2123115251 in words is "two billion, one hundred twenty-three million, one hundred fifteen thousand, two hundred fifty-one".