11100320397 has 24 divisors (see below), whose sum is σ = 16163537208. Its totient is φ = 7340544000.

The previous prime is 11100320339. The next prime is 11100320419. The reversal of 11100320397 is 79302300111.

It can be written as a sum of positive squares in 4 ways, for example, as 411035076 + 10689285321 = 20274^2 + 103389^2 .

It is not a de Polignac number, because 11100320397 - 2⁸ = 11100320141 is a prime.

It is a super-2 number, since 2×11100320397² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11100320397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100320597) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644733 + ... + 661725.

It is an arithmetic number, because the mean of its divisors is an integer number (673480717).

Almost surely, 2^11100320397 is an apocalyptic number.

It is an amenable number.

11100320397 is a deficient number, since it is larger than the sum of its proper divisors (5063216811).

11100320397 is a wasteful number, since it uses less digits than its factorization.

11100320397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17581 (or 17578 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The spelling of 11100320397 in words is "eleven billion, one hundred million, three hundred twenty thousand, three hundred ninety-seven".