122112120122221 has 4 divisors (see below), whose sum is σ = 124416122388732. Its totient is φ = 119808117855712.

The previous prime is 122112120122171. The next prime is 122112120122243. The reversal of 122112120122221 is 122221021211221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75558600078025 + 46553520044196 = 8692445^2 + 6823014^2 .

It is a cyclic number.

It is not a de Polignac number, because 122112120122221 - 2¹⁹ = 122112119597933 is a prime.

It is a super-2 number, since 2×122112120122221² (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 = 122112120122192 and 122112120122201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122112120122281) 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, 1152001133176 + ... + 1152001133281.

It is an arithmetic number, because the mean of its divisors is an integer number (31104030597183).

Almost surely, 2^{122112120122221} is an apocalyptic number.

It is an amenable number.

122112120122221 is a deficient number, since it is larger than the sum of its proper divisors (2304002266511).

122112120122221 is an equidigital number, since it uses as much as digits as its factorization.

122112120122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304002266510.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 122112120122221 its reverse (122221021211221), we get a palindrome (244333141333442).

The spelling of 122112120122221 in words is "one hundred twenty-two trillion, one hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".