2120251751 has 2 divisors, whose sum is σ = 2120251752. Its totient is φ = 2120251750.

The previous prime is 2120251739. The next prime is 2120251753. The reversal of 2120251751 is 1571520212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2120251751 - 2⁶ = 2120251687 is a prime.

Together with 2120251753, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120251751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120251753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060125875 + 1060125876.

It is an arithmetic number, because the mean of its divisors is an integer number (1060125876).

Almost surely, 2^2120251751 is an apocalyptic number.

2120251751 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120251751 is an equidigital number, since it uses as much as digits as its factorization.

2120251751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 2120251751 is about 46046.1914928911. The cubic root of 2120251751 is about 1284.6825059049.

Adding to 2120251751 its reverse (1571520212), we get a palindrome (3691771963).

The spelling of 2120251751 in words is "two billion, one hundred twenty million, two hundred fifty-one thousand, seven hundred fifty-one".