1101311249 has 2 divisors, whose sum is σ = 1101311250. Its totient is φ = 1101311248.

The previous prime is 1101311207. The next prime is 1101311251. The reversal of 1101311249 is 9421131011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935931649 + 165379600 = 30593^2 + 12860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101311249 - 2⁸ = 1101310993 is a prime.

Together with 1101311251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1101311149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550655624 + 550655625.

It is an arithmetic number, because the mean of its divisors is an integer number (550655625).

Almost surely, 2^1101311249 is an apocalyptic number.

It is an amenable number.

1101311249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101311249 is an equidigital number, since it uses as much as digits as its factorization.

1101311249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1101311249 is about 33186.0098384847. The cubic root of 1101311249 is about 1032.6901272091.

The spelling of 1101311249 in words is "one billion, one hundred one million, three hundred eleven thousand, two hundred forty-nine".