122181220 has 48 divisors (see below), whose sum is σ = 293868288. Its totient is φ = 41800320.

The previous prime is 122181203. The next prime is 122181233. The reversal of 122181220 is 22181221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114409 + ... + 115471.

It is an arithmetic number, because the mean of its divisors is an integer number (6122256).

Almost surely, 2^122181220 is an apocalyptic number.

122181220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122181220 is an abundant number, since it is smaller than the sum of its proper divisors (171687068).

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

122181220 is a wasteful number, since it uses less digits than its factorization.

122181220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1898 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 122181220 is about 11053.5614170275. The cubic root of 122181220 is about 496.2130165934.

Subtracting from 122181220 its reverse (22181221), we obtain a palindrome (99999999).

The spelling of 122181220 in words is "one hundred twenty-two million, one hundred eighty-one thousand, two hundred twenty".