122222020111221 has 4 divisors (see below), whose sum is σ = 162962693481632. Its totient is φ = 81481346740812.

The previous prime is 122222020111189. The next prime is 122222020111231. The reversal of 122222020111221 is 122111020222221.

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 not a de Polignac number, because 122222020111221 - 2⁵ = 122222020111189 is a prime.

It is a super-2 number, since 2×122222020111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222020111231) 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, 20370336685201 + ... + 20370336685206.

It is an arithmetic number, because the mean of its divisors is an integer number (40740673370408).

Almost surely, 2^{122222020111221} is an apocalyptic number.

It is an amenable number.

122222020111221 is a deficient number, since it is larger than the sum of its proper divisors (40740673370411).

122222020111221 is an equidigital number, since it uses as much as digits as its factorization.

122222020111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40740673370410.

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

Adding to 122222020111221 its reverse (122111020222221), we get a palindrome (244333040333442).

The spelling of 122222020111221 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, twenty million, one hundred eleven thousand, two hundred twenty-one".