11999960261 has 2 divisors, whose sum is σ = 11999960262. Its totient is φ = 11999960260.

The previous prime is 11999960251. The next prime is 11999960279. The reversal of 11999960261 is 16206999911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9000316900 + 2999643361 = 94870^2 + 54769^2 .

It is a cyclic number.

It is not a de Polignac number, because 11999960261 - 2⁶ = 11999960197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11999960201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999980130 + 5999980131.

It is an arithmetic number, because the mean of its divisors is an integer number (5999980131).

Almost surely, 2^11999960261 is an apocalyptic number.

It is an amenable number.

11999960261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11999960261 is an equidigital number, since it uses as much as digits as its factorization.

11999960261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 11999960261 in words is "eleven billion, nine hundred ninety-nine million, nine hundred sixty thousand, two hundred sixty-one".