1248120911 has 2 divisors, whose sum is σ = 1248120912. Its totient is φ = 1248120910.

The previous prime is 1248120877. The next prime is 1248120917. The reversal of 1248120911 is 1190218421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1248120911 - 2⁶ = 1248120847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248120917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624060455 + 624060456.

It is an arithmetic number, because the mean of its divisors is an integer number (624060456).

Almost surely, 2^1248120911 is an apocalyptic number.

1248120911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248120911 is an equidigital number, since it uses as much as digits as its factorization.

1248120911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1248120911 is about 35328.7547332198. The cubic root of 1248120911 is about 1076.6772910393.

The spelling of 1248120911 in words is "one billion, two hundred forty-eight million, one hundred twenty thousand, nine hundred eleven".