22101231999 has 48 divisors (see below), whose sum is σ = 38307983616. Its totient is φ = 11201097600.

The previous prime is 22101231953. The next prime is 22101232001. The reversal of 22101231999 is 99913210122.

It is not a de Polignac number, because 22101231999 - 2⁸ = 22101231743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101231199) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100387 + ... + 232980.

It is an arithmetic number, because the mean of its divisors is an integer number (798082992).

Almost surely, 2^22101231999 is an apocalyptic number.

22101231999 is a deficient number, since it is larger than the sum of its proper divisors (16206751617).

22101231999 is a wasteful number, since it uses less digits than its factorization.

22101231999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333436 (or 333429 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

It can be divided in two parts, 2210123 and 1999, that added together give a palindrome (2212122).

The spelling of 22101231999 in words is "twenty-two billion, one hundred one million, two hundred thirty-one thousand, nine hundred ninety-nine".