1249911211 has 2 divisors, whose sum is σ = 1249911212. Its totient is φ = 1249911210.

The previous prime is 1249911161. The next prime is 1249911253. The reversal of 1249911211 is 1121199421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249911211 - 2⁹ = 1249910699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249915211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624955605 + 624955606.

It is an arithmetic number, because the mean of its divisors is an integer number (624955606).

Almost surely, 2^1249911211 is an apocalyptic number.

1249911211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249911211 is an equidigital number, since it uses as much as digits as its factorization.

1249911211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 31.

The square root of 1249911211 is about 35354.0833709488. The cubic root of 1249911211 is about 1077.1918390651.

The spelling of 1249911211 in words is "one billion, two hundred forty-nine million, nine hundred eleven thousand, two hundred eleven".