11247893921 has 24 divisors (see below), whose sum is σ = 12721524480. Its totient is φ = 9930206880.

The previous prime is 11247893903. The next prime is 11247893939. The reversal of 11247893921 is 12939874211.

It is an interprime number because it is at equal distance from previous prime (11247893903) and next prime (11247893939).

It is not a de Polignac number, because 11247893921 - 2⁶ = 11247893857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11247893981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2715470 + ... + 2719608.

It is an arithmetic number, because the mean of its divisors is an integer number (530063520).

Almost surely, 2^11247893921 is an apocalyptic number.

11247893921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11247893921 is a deficient number, since it is larger than the sum of its proper divisors (1473630559).

11247893921 is a wasteful number, since it uses less digits than its factorization.

11247893921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805 (or 4794 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The spelling of 11247893921 in words is "eleven billion, two hundred forty-seven million, eight hundred ninety-three thousand, nine hundred twenty-one".