122321100 has 144 divisors (see below), whose sum is σ = 390974976. Its totient is φ = 29280000.

The previous prime is 122321093. The next prime is 122321117. The reversal of 122321100 is 1123221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 333117 + ... + 333483.

It is an arithmetic number, because the mean of its divisors is an integer number (2715104).

Almost surely, 2^122321100 is an apocalyptic number.

122321100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122321100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195487488).

122321100 is an abundant number, since it is smaller than the sum of its proper divisors (268653876).

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

122321100 is a wasteful number, since it uses less digits than its factorization.

122321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 122321100 is about 11059.8869795310. The cubic root of 122321100 is about 496.4023086557.

Adding to 122321100 its reverse (1123221), we get a palindrome (123444321).

The spelling of 122321100 in words is "one hundred twenty-two million, three hundred twenty-one thousand, one hundred".