122212120112100 has 432 divisors, whose sum is σ = 397966207438800. Its totient is φ = 31342920744960.

The previous prime is 122212120112023. The next prime is 122212120112119. The reversal of 122212120112100 is 1211021212221.

122212120112100 is a `hidden beast` number, since 1 + 222 + 121 + 201 + 121 + 0 + 0 = 666.

It can be written as a sum of positive squares in 24 ways, for example, as 35907611351616 + 86304508760484 = 5992296^2 + 9290022^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 16232181136 + ... + 16232188664.

It is an arithmetic number, because the mean of its divisors is an integer number (921218072775).

Almost surely, 2^{122212120112100} is an apocalyptic number.

122212120112100 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 122212120112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198983103719400).

122212120112100 is an abundant number, since it is smaller than the sum of its proper divisors (275754087326700).

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

122212120112100 is a wasteful number, since it uses less digits than its factorization.

122212120112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13152 (or 13142 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 122212120112100 its reverse (1211021212221), we get a palindrome (123423141324321).

The spelling of 122212120112100 in words is "one hundred twenty-two trillion, two hundred twelve billion, one hundred twenty million, one hundred twelve thousand, one hundred".