122011222172 has 96 divisors (see below), whose sum is σ = 261163865088. Its totient is φ = 48685077504.

The previous prime is 122011222171. The next prime is 122011222243. The reversal of 122011222172 is 271222110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122011222171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50064938 + ... + 50067374.

It is an arithmetic number, because the mean of its divisors is an integer number (2720456928).

Almost surely, 2^122011222172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122011222172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130581932544).

122011222172 is an abundant number, since it is smaller than the sum of its proper divisors (139152642916).

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

122011222172 is a wasteful number, since it uses less digits than its factorization.

122011222172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 122011222172 its reverse (271222110221), we get a palindrome (393233332393).

The spelling of 122011222172 in words is "one hundred twenty-two billion, eleven million, two hundred twenty-two thousand, one hundred seventy-two".