122100110211221 has 4 divisors (see below), whose sum is σ = 122468992719744. Its totient is φ = 121731227702700.

The previous prime is 122100110211187. The next prime is 122100110211223. The reversal of 122100110211221 is 122112011001221.

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 a de Polignac number, because none of the positive numbers 2^k-122100110211221 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 122100110211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100110211223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184441253765 + ... + 184441254426.

It is an arithmetic number, because the mean of its divisors is an integer number (30617248179936).

Almost surely, 2^{122100110211221} is an apocalyptic number.

It is an amenable number.

122100110211221 is a deficient number, since it is larger than the sum of its proper divisors (368882508523).

122100110211221 is an equidigital number, since it uses as much as digits as its factorization.

122100110211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368882508522.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 122100110211221 its reverse (122112011001221), we get a palindrome (244212121212442).

The spelling of 122100110211221 in words is "one hundred twenty-two trillion, one hundred billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-one".