122221100 has 36 divisors (see below), whose sum is σ = 265727784. Its totient is φ = 48794880.

The previous prime is 122221087. The next prime is 122221147. The reversal of 122221100 is 1122221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77924 + ... + 79476.

Almost surely, 2^122221100 is an apocalyptic number.

122221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122221100 is an abundant number, since it is smaller than the sum of its proper divisors (143506684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122221100 is a wasteful number, since it uses less digits than its factorization.

122221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 122221100 is about 11055.3652133252. The cubic root of 122221100 is about 496.2669987642.

Adding to 122221100 its reverse (1122221), we get a palindrome (123343321).

It can be divided in two parts, 1222 and 21100, that added together give a palindrome (22322).

The spelling of 122221100 in words is "one hundred twenty-two million, two hundred twenty-one thousand, one hundred".