2311012261 has 2 divisors, whose sum is σ = 2311012262. Its totient is φ = 2311012260.

The previous prime is 2311012247. The next prime is 2311012279. The reversal of 2311012261 is 1622101132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2279585025 + 31427236 = 47745^2 + 5606^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311012261 - 2⁵ = 2311012229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311012061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155506130 + 1155506131.

It is an arithmetic number, because the mean of its divisors is an integer number (1155506131).

Almost surely, 2^2311012261 is an apocalyptic number.

It is an amenable number.

2311012261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311012261 is an equidigital number, since it uses as much as digits as its factorization.

2311012261 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 19.

The square root of 2311012261 is about 48072.9888918923. The cubic root of 2311012261 is about 1322.1094716341.

Adding to 2311012261 its reverse (1622101132), we get a palindrome (3933113393).

The spelling of 2311012261 in words is "two billion, three hundred eleven million, twelve thousand, two hundred sixty-one".