122211111821 has 8 divisors (see below), whose sum is σ = 123766917120. Its totient is φ = 120655527408.

The previous prime is 122211111727. The next prime is 122211111871. The reversal of 122211111821 is 128111112221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122211111821 - 2²⁶ = 122144002957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211111871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1254740 + ... + 1348626.

It is an arithmetic number, because the mean of its divisors is an integer number (15470864640).

Almost surely, 2^122211111821 is an apocalyptic number.

It is an amenable number.

122211111821 is a deficient number, since it is larger than the sum of its proper divisors (1555805299).

122211111821 is an equidigital number, since it uses as much as digits as its factorization.

122211111821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110443.

The product of its digits is 128, while the sum is 23.

The spelling of 122211111821 in words is "one hundred twenty-two billion, two hundred eleven million, one hundred eleven thousand, eight hundred twenty-one".