23212199999 has 4 divisors (see below), whose sum is σ = 23232870936. Its totient is φ = 23191529064.

The previous prime is 23212199953. The next prime is 23212200017. The reversal of 23212199999 is 99999121232.

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

It is a cyclic number.

It is not a de Polignac number, because 23212199999 - 2⁸ = 23212199743 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 (23212199939) 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, 10333784 + ... + 10336029.

It is an arithmetic number, because the mean of its divisors is an integer number (5808217734).

Almost surely, 2^23212199999 is an apocalyptic number.

23212199999 is a deficient number, since it is larger than the sum of its proper divisors (20670937).

23212199999 is a wasteful number, since it uses less digits than its factorization.

23212199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20670936.

The product of its digits is 1417176, while the sum is 56.

The spelling of 23212199999 in words is "twenty-three billion, two hundred twelve million, one hundred ninety-nine thousand, nine hundred ninety-nine".