22022121121221 has 8 divisors (see below), whose sum is σ = 31621507251040. Its totient is φ = 13552074536112.

The previous prime is 22022121121141. The next prime is 22022121121237. The reversal of 22022121121221 is 12212112122022.

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

It is not a de Polignac number, because 22022121121221 - 2⁷ = 22022121121093 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 (22022121121321) 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, 282334886131 + ... + 282334886208.

It is an arithmetic number, because the mean of its divisors is an integer number (3952688406380).

Almost surely, 2^{22022121121221} is an apocalyptic number.

It is an amenable number.

22022121121221 is a deficient number, since it is larger than the sum of its proper divisors (9599386129819).

22022121121221 is a wasteful number, since it uses less digits than its factorization.

22022121121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564669772355.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22022121121221 its reverse (12212112122022), we get a palindrome (34234233243243).

The spelling of 22022121121221 in words is "twenty-two trillion, twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".