21231233099999 has 16 divisors (see below), whose sum is σ = 22967812681632. Its totient is φ = 19509464729088.

The previous prime is 21231233099981. The next prime is 21231233100029. The reversal of 21231233099999 is 99999033213212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21231233099999 - 2⁸ = 21231233099743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231233099929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12412259 + ... + 14018795.

It is an arithmetic number, because the mean of its divisors is an integer number (1435488292602).

Almost surely, 2^{21231233099999} is an apocalyptic number.

21231233099999 is a deficient number, since it is larger than the sum of its proper divisors (1736579581633).

21231233099999 is a wasteful number, since it uses less digits than its factorization.

21231233099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611146.

The product of its (nonzero) digits is 12754584, while the sum is 62.

The spelling of 21231233099999 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-three million, ninety-nine thousand, nine hundred ninety-nine".