12222112100021 has 4 divisors (see below), whose sum is σ = 12222721306752. Its totient is φ = 12221502893292.

The previous prime is 12222112099999. The next prime is 12222112100027. The reversal of 12222112100021 is 12000121122221.

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 a cyclic number.

It is not a de Polignac number, because 12222112100021 - 2¹⁰ = 12222112098997 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 (12222112100027) 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, 304573271 + ... + 304613396.

It is an arithmetic number, because the mean of its divisors is an integer number (3055680326688).

Almost surely, 2^{12222112100021} is an apocalyptic number.

It is an amenable number.

12222112100021 is a deficient number, since it is larger than the sum of its proper divisors (609206731).

12222112100021 is an equidigital number, since it uses as much as digits as its factorization.

12222112100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609206730.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12222112100021 its reverse (12000121122221), we get a palindrome (24222233222242).

The spelling of 12222112100021 in words is "twelve trillion, two hundred twenty-two billion, one hundred twelve million, one hundred thousand, twenty-one".