122122221221 has 96 divisors (see below), whose sum is σ = 174243363840. Its totient is φ = 84038169600.

The previous prime is 122122221161. The next prime is 122122221257.

122122221221 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-122122221221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122122221193 and 122122221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122221281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19329155 + ... + 19335471.

It is an arithmetic number, because the mean of its divisors is an integer number (1815035040).

Almost surely, 2^122122221221 is an apocalyptic number.

122122221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122122221221 is a deficient number, since it is larger than the sum of its proper divisors (52121142619).

122122221221 is a wasteful number, since it uses less digits than its factorization.

122122221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475 (or 6468 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

It can be divided in two parts, 122122 and 221221, that added together give a palindrome (343343).

The spelling of 122122221221 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".