122102112221 has 4 divisors (see below), whose sum is σ = 128528539200. Its totient is φ = 115675685244.

The previous prime is 122102112211. The next prime is 122102112233. The reversal of 122102112221 is 122211201221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122211201221 = 127 ⋅962292923.

It is a cyclic number.

It is not a de Polignac number, because 122102112221 - 2²² = 122097917917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122102112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122102112211) 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, 3213213461 + ... + 3213213498.

It is an arithmetic number, because the mean of its divisors is an integer number (32132134800).

Almost surely, 2^122102112221 is an apocalyptic number.

It is an amenable number.

122102112221 is a deficient number, since it is larger than the sum of its proper divisors (6426426979).

122102112221 is an equidigital number, since it uses as much as digits as its factorization.

122102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426426978.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122102112221 its reverse (122211201221), we get a palindrome (244313313442).

The spelling of 122102112221 in words is "one hundred twenty-two billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".