2311250021 has 2 divisors, whose sum is σ = 2311250022. Its totient is φ = 2311250020.

The previous prime is 2311249979. The next prime is 2311250027. The reversal of 2311250021 is 1200521132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191009121 + 1120240900 = 34511^2 + 33470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311250021 - 2³⁰ = 1237508197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311250027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155625010 + 1155625011.

It is an arithmetic number, because the mean of its divisors is an integer number (1155625011).

Almost surely, 2^2311250021 is an apocalyptic number.

It is an amenable number.

2311250021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311250021 is an equidigital number, since it uses as much as digits as its factorization.

2311250021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2311250021 is about 48075.4617346521. The cubic root of 2311250021 is about 1322.1548102034.

Adding to 2311250021 its reverse (1200521132), we get a palindrome (3511771153).

The spelling of 2311250021 in words is "two billion, three hundred eleven million, two hundred fifty thousand, twenty-one".