122111222100 has 288 divisors, whose sum is σ = 416101867776. Its totient is φ = 27064627200.

The previous prime is 122111222089. The next prime is 122111222153. The reversal of 122111222100 is 1222111221.

It is a super-2 number, since 2×122111222100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 122111222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24317590 + ... + 24322610.

It is an arithmetic number, because the mean of its divisors is an integer number (1444798152).

Almost surely, 2^122111222100 is an apocalyptic number.

122111222100 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 122111222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208050933888).

122111222100 is an abundant number, since it is smaller than the sum of its proper divisors (293990645676).

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

122111222100 is a wasteful number, since it uses less digits than its factorization.

122111222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395 (or 5388 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122111222100 its reverse (1222111221), we get a palindrome (123333333321).

The spelling of 122111222100 in words is "one hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, one hundred".