22111022201221 has 4 divisors (see below), whose sum is σ = 22121616847392. Its totient is φ = 22100427555052.

The previous prime is 22111022201189. The next prime is 22111022201237. The reversal of 22111022201221 is 12210222011122.

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 22111022201221 - 2⁵ = 22111022201189 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 (22111022201321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5297319955 + ... + 5297324128.

It is an arithmetic number, because the mean of its divisors is an integer number (5530404211848).

Almost surely, 2^{22111022201221} is an apocalyptic number.

It is an amenable number.

22111022201221 is a deficient number, since it is larger than the sum of its proper divisors (10594646171).

22111022201221 is a wasteful number, since it uses less digits than its factorization.

22111022201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10594646170.

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

Adding to 22111022201221 its reverse (12210222011122), we get a palindrome (34321244212343).

The spelling of 22111022201221 in words is "twenty-two trillion, one hundred eleven billion, twenty-two million, two hundred one thousand, two hundred twenty-one".