22211101121221 has 4 divisors (see below), whose sum is σ = 22213300468000. Its totient is φ = 22208901774444.

The previous prime is 22211101121219. The next prime is 22211101121263. The reversal of 22211101121221 is 12212110111222.

It is a happy number.

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 22211101121221 - 2¹ = 22211101121219 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 (22211101151221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099658241 + ... + 1099678438.

It is an arithmetic number, because the mean of its divisors is an integer number (5553325117000).

Almost surely, 2^{22211101121221} is an apocalyptic number.

It is an amenable number.

22211101121221 is a deficient number, since it is larger than the sum of its proper divisors (2199346779).

22211101121221 is a wasteful number, since it uses less digits than its factorization.

22211101121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199346778.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22211101121221 its reverse (12212110111222), we get a palindrome (34423211232443).

The spelling of 22211101121221 in words is "twenty-two trillion, two hundred eleven billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-one".