122122211011221 has 4 divisors (see below), whose sum is σ = 162829614681632. Its totient is φ = 81414807340812.

The previous prime is 122122211011123. The next prime is 122122211011231. The reversal of 122122211011221 is 122110112221221.

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 122122211011221 - 2¹¹ = 122122211009173 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 (122122211011231) 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, 20353701835201 + ... + 20353701835206.

It is an arithmetic number, because the mean of its divisors is an integer number (40707403670408).

Almost surely, 2^{122122211011221} is an apocalyptic number.

It is an amenable number.

122122211011221 is a deficient number, since it is larger than the sum of its proper divisors (40707403670411).

122122211011221 is an equidigital number, since it uses as much as digits as its factorization.

122122211011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40707403670410.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 122122211011221 its reverse (122110112221221), we get a palindrome (244232323232442).

The spelling of 122122211011221 in words is "one hundred twenty-two trillion, one hundred twenty-two billion, two hundred eleven million, eleven thousand, two hundred twenty-one".