222100112201221 has 4 divisors (see below), whose sum is σ = 222100142040000. Its totient is φ = 222100082362444.

The previous prime is 222100112201183. The next prime is 222100112201239. The reversal of 222100112201221 is 122102211001222.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 222100112201221 - 2²¹ = 222100110104069 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 (222100112201521) 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, 6411780 + ... + 22029778.

It is an arithmetic number, because the mean of its divisors is an integer number (55525035510000).

Almost surely, 2^{222100112201221} is an apocalyptic number.

It is an amenable number.

222100112201221 is a deficient number, since it is larger than the sum of its proper divisors (29838779).

222100112201221 is a wasteful number, since it uses less digits than its factorization.

222100112201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29838778.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222100112201221 its reverse (122102211001222), we get a palindrome (344202323202443).

The spelling of 222100112201221 in words is "two hundred twenty-two trillion, one hundred billion, one hundred twelve million, two hundred one thousand, two hundred twenty-one".