11623221399 has 4 divisors (see below), whose sum is σ = 15497628536. Its totient is φ = 7748814264.

The previous prime is 11623221347. The next prime is 11623221413. The reversal of 11623221399 is 99312232611.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11623221399 - 2¹⁵ = 11623188631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11623221319) 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, 1937203564 + ... + 1937203569.

It is an arithmetic number, because the mean of its divisors is an integer number (3874407134).

Almost surely, 2^11623221399 is an apocalyptic number.

11623221399 is a deficient number, since it is larger than the sum of its proper divisors (3874407137).

11623221399 is an equidigital number, since it uses as much as digits as its factorization.

11623221399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874407136.

The product of its digits is 34992, while the sum is 39.

The spelling of 11623221399 in words is "eleven billion, six hundred twenty-three million, two hundred twenty-one thousand, three hundred ninety-nine".