122212112221221 has 64 divisors (see below), whose sum is σ = 190809955687680. Its totient is φ = 68863739535360.

The previous prime is 122212112221159. The next prime is 122212112221231. The reversal of 122212112221221 is 122122211212221.

It is not a de Polignac number, because 122212112221221 - 2¹⁷ = 122212112090149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122212112221191 and 122212112221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212112221231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14356266 + ... + 21225611.

It is an arithmetic number, because the mean of its divisors is an integer number (2981405557620).

Almost surely, 2^{122212112221221} is an apocalyptic number.

122212112221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122212112221221 is a deficient number, since it is larger than the sum of its proper divisors (68597843466459).

122212112221221 is a wasteful number, since it uses less digits than its factorization.

122212112221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35582054.

The product of its digits is 512, while the sum is 24.

Adding to 122212112221221 its reverse (122122211212221), we get a palindrome (244334323433442).

The spelling of 122212112221221 in words is "one hundred twenty-two trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".