122172220 has 24 divisors (see below), whose sum is σ = 257519808. Its totient is φ = 48686400.

The previous prime is 122172181. The next prime is 122172227. The reversal of 122172220 is 22271221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122172227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5851 + ... + 16690.

It is an arithmetic number, because the mean of its divisors is an integer number (10729992).

Almost surely, 2^122172220 is an apocalyptic number.

122172220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122172220 is an abundant number, since it is smaller than the sum of its proper divisors (135347588).

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

122172220 is a wasteful number, since it uses less digits than its factorization.

122172220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22821 (or 22819 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 122172220 is about 11053.1543009224. The cubic root of 122172220 is about 496.2008324329.

Subtracting from 122172220 its reverse (22271221), we obtain a palindrome (99900999).

It can be divided in two parts, 1221 and 72220, that added together give a square (73441 = 271²).

The spelling of 122172220 in words is "one hundred twenty-two million, one hundred seventy-two thousand, two hundred twenty".