22111200122221 has 16 divisors (see below), whose sum is σ = 25476795590400. Its totient is φ = 18797947175808.

The previous prime is 22111200122159. The next prime is 22111200122329. The reversal of 22111200122221 is 12222100211122.

It is a cyclic number.

It is not a de Polignac number, because 22111200122221 - 2²⁷ = 22111065904493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111200122521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25802056 + ... + 26645233.

It is an arithmetic number, because the mean of its divisors is an integer number (1592299724400).

Almost surely, 2^{22111200122221} is an apocalyptic number.

It is an amenable number.

22111200122221 is a deficient number, since it is larger than the sum of its proper divisors (3365595468179).

22111200122221 is a wasteful number, since it uses less digits than its factorization.

22111200122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52447788.

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

Adding to 22111200122221 its reverse (12222100211122), we get a palindrome (34333300333343).

The spelling of 22111200122221 in words is "twenty-two trillion, one hundred eleven billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".