22021111121221 has 8 divisors (see below), whose sum is σ = 22040183268224. Its totient is φ = 22002045195600.

The previous prime is 22021111121203. The next prime is 22021111121263. The reversal of 22021111121221 is 12212111112022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22021111121221 - 2²³ = 22021102732613 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 (22021111121201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5540896 + ... + 8645446.

It is an arithmetic number, because the mean of its divisors is an integer number (2755022908528).

Almost surely, 2^{22021111121221} is an apocalyptic number.

It is an amenable number.

22021111121221 is a deficient number, since it is larger than the sum of its proper divisors (19072147003).

22021111121221 is a wasteful number, since it uses less digits than its factorization.

22021111121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110691.

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

Adding to 22021111121221 its reverse (12212111112022), we get a palindrome (34233222233243).

The spelling of 22021111121221 in words is "twenty-two trillion, twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".