22200121121221 has 8 divisors (see below), whose sum is σ = 22216265210880. Its totient is φ = 22183978667088.

The previous prime is 22200121121179. The next prime is 22200121121287. The reversal of 22200121121221 is 12212112100222.

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 22200121121221 - 2⁷ = 22200121121093 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 (22200121121821) 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, 27436375 + ... + 28233931.

It is an arithmetic number, because the mean of its divisors is an integer number (2777033151360).

Almost surely, 2^{22200121121221} is an apocalyptic number.

It is an amenable number.

22200121121221 is a deficient number, since it is larger than the sum of its proper divisors (16144089659).

22200121121221 is a wasteful number, since it uses less digits than its factorization.

22200121121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817763.

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

Adding to 22200121121221 its reverse (12212112100222), we get a palindrome (34412233221443).

The spelling of 22200121121221 in words is "twenty-two trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".