11394400721 has 12 divisors (see below), whose sum is σ = 13068967296. Its totient is φ = 9908172120.

The previous prime is 11394400697. The next prime is 11394400741. The reversal of 11394400721 is 12700449311.

It is not a de Polignac number, because 11394400721 - 2²² = 11390206417 is a prime.

It is a super-3 number, since 3×11394400721³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11394400741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2044361 + ... + 2049926.

It is an arithmetic number, because the mean of its divisors is an integer number (1089080608).

Almost surely, 2^11394400721 is an apocalyptic number.

11394400721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11394400721 is a deficient number, since it is larger than the sum of its proper divisors (1674566575).

11394400721 is a wasteful number, since it uses less digits than its factorization.

11394400721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094332 (or 4094321 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 11394400721 in words is "eleven billion, three hundred ninety-four million, four hundred thousand, seven hundred twenty-one".