11312100309 has 4 divisors (see below), whose sum is σ = 15082800416. Its totient is φ = 7541400204.

The previous prime is 11312100277. The next prime is 11312100377. The reversal of 11312100309 is 90300121311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11312100309 - 2⁵ = 11312100277 is a prime.

It is a super-2 number, since 2×11312100309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312000309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885350049 + ... + 1885350054.

It is an arithmetic number, because the mean of its divisors is an integer number (3770700104).

Almost surely, 2^11312100309 is an apocalyptic number.

It is an amenable number.

11312100309 is a deficient number, since it is larger than the sum of its proper divisors (3770700107).

11312100309 is an equidigital number, since it uses as much as digits as its factorization.

11312100309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770700106.

The product of its (nonzero) digits is 162, while the sum is 21.

The spelling of 11312100309 in words is "eleven billion, three hundred twelve million, one hundred thousand, three hundred nine".