122211111222121 has 4 divisors (see below), whose sum is σ = 126153405132544. Its totient is φ = 118268817311700.

The previous prime is 122211111222119. The next prime is 122211111222163. The reversal of 122211111222121 is 121222111112221.

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 122211111222121 - 2¹ = 122211111222119 is a prime.

It is a super-2 number, since 2×122211111222121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122211111222092 and 122211111222101.

It is not an unprimeable number, because it can be changed into a prime (122211111223121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971146955165 + ... + 1971146955226.

It is an arithmetic number, because the mean of its divisors is an integer number (31538351283136).

Almost surely, 2^{122211111222121} is an apocalyptic number.

It is an amenable number.

122211111222121 is a deficient number, since it is larger than the sum of its proper divisors (3942293910423).

122211111222121 is an equidigital number, since it uses as much as digits as its factorization.

122211111222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942293910422.

The product of its digits is 128, while the sum is 22.

Adding to 122211111222121 its reverse (121222111112221), we get a palindrome (243433222334342).

The spelling of 122211111222121 in words is "one hundred twenty-two trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".