11319921 has 12 divisors (see below), whose sum is σ = 16443700. Its totient is φ = 7503840.

The previous prime is 11319901. The next prime is 11319923. The reversal of 11319921 is 12991311.

It can be written as a sum of positive squares in 2 ways, for example, as 4223025 + 7096896 = 2055^2 + 2664^2 .

It is not a de Polignac number, because 11319921 - 2⁹ = 11319409 is a prime.

It is a super-2 number, since 2×11319921² = 256281222892482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11319923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1846 + ... + 5103.

Almost surely, 2^11319921 is an apocalyptic number.

It is an amenable number.

11319921 is a deficient number, since it is larger than the sum of its proper divisors (5123779).

11319921 is a wasteful number, since it uses less digits than its factorization.

11319921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136 (or 7133 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 11319921 is about 3364.5090280753. The cubic root of 11319921 is about 224.5334926874.

The spelling of 11319921 in words is "eleven million, three hundred nineteen thousand, nine hundred twenty-one".