122122211122221 has 16 divisors (see below), whose sum is σ = 168725417794560. Its totient is φ = 78514839290160.

The previous prime is 122122211122217. The next prime is 122122211122231. The reversal of 122122211122221 is 122221112221221.

It is not a de Polignac number, because 122122211122221 - 2² = 122122211122217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122122211122191 and 122122211122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122211122231) 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 15 ways as a sum of consecutive naturals, for example, 5991659475 + ... + 5991679856.

It is an arithmetic number, because the mean of its divisors is an integer number (10545338612160).

Almost surely, 2^{122122211122221} is an apocalyptic number.

It is an amenable number.

122122211122221 is a deficient number, since it is larger than the sum of its proper divisors (46603206672339).

122122211122221 is a wasteful number, since it uses less digits than its factorization.

122122211122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11983339456.

The product of its digits is 512, while the sum is 24.

Adding to 122122211122221 its reverse (122221112221221), we get a palindrome (244343323343442).

The spelling of 122122211122221 in words is "one hundred twenty-two trillion, one hundred twenty-two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".