122121102221 has 4 divisors (see below), whose sum is σ = 122121808032. Its totient is φ = 122120396412.

The previous prime is 122121102163. The next prime is 122121102253. The reversal of 122121102221 is 122201121221.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122121102221 is a prime.

It is a super-2 number, since 2×122121102221² (a number of 23 digits) contains 22 as substring.

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 122121102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121107221) 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, 102650 + ... + 504756.

It is an arithmetic number, because the mean of its divisors is an integer number (30530452008).

Almost surely, 2^122121102221 is an apocalyptic number.

It is an amenable number.

122121102221 is a deficient number, since it is larger than the sum of its proper divisors (705811).

122121102221 is an equidigital number, since it uses as much as digits as its factorization.

122121102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705810.

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

Adding to 122121102221 its reverse (122201121221), we get a palindrome (244322223442).

The spelling of 122121102221 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty-one".