122211211021 has 4 divisors (see below), whose sum is σ = 122247771712. Its totient is φ = 122174650332.

The previous prime is 122211211013. The next prime is 122211211027. The reversal of 122211211021 is 120112112221.

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: 120112112221 = 239 ⋅502561139.

It is a cyclic number.

It is not a de Polignac number, because 122211211021 - 2³ = 122211211013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122211210986 and 122211211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211211027) 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 3 ways as a sum of consecutive naturals, for example, 18275331 + ... + 18282016.

It is an arithmetic number, because the mean of its divisors is an integer number (30561942928).

Almost surely, 2^122211211021 is an apocalyptic number.

It is an amenable number.

122211211021 is a deficient number, since it is larger than the sum of its proper divisors (36560691).

122211211021 is an equidigital number, since it uses as much as digits as its factorization.

122211211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36560690.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122211211021 its reverse (120112112221), we get a palindrome (242323323242).

The spelling of 122211211021 in words is "one hundred twenty-two billion, two hundred eleven million, two hundred eleven thousand, twenty-one".