22111210101221 has 4 divisors (see below), whose sum is σ = 22111276875744. Its totient is φ = 22111143326700.

The previous prime is 22111210101209. The next prime is 22111210101241. The reversal of 22111210101221 is 12210101211122.

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 22111210101221 - 2¹⁰ = 22111210100197 is a prime.

It is a super-2 number, since 2×22111210101221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22111210101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111210101241) 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, 32888075 + ... + 33553656.

It is an arithmetic number, because the mean of its divisors is an integer number (5527819218936).

Almost surely, 2^{22111210101221} is an apocalyptic number.

It is an amenable number.

22111210101221 is a deficient number, since it is larger than the sum of its proper divisors (66774523).

22111210101221 is an equidigital number, since it uses as much as digits as its factorization.

22111210101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66774522.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22111210101221 its reverse (12210101211122), we get a palindrome (34321311312343).

The spelling of 22111210101221 in words is "twenty-two trillion, one hundred eleven billion, two hundred ten million, one hundred one thousand, two hundred twenty-one".