121100122200 has 192 divisors, whose sum is σ = 397956672000. Its totient is φ = 30358333440.

The previous prime is 121100122193. The next prime is 121100122219. The reversal of 121100122200 is 2221001121.

It is a super-3 number, since 3×121100122200³ (a number of 34 digits) contains 333 as substring.

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, 9367341 + ... + 9380259.

It is an arithmetic number, because the mean of its divisors is an integer number (2072691000).

Almost surely, 2^121100122200 is an apocalyptic number.

121100122200 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 121100122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198978336000).

121100122200 is an abundant number, since it is smaller than the sum of its proper divisors (276856549800).

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

121100122200 is a wasteful number, since it uses less digits than its factorization.

121100122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13874 (or 13865 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121100122200 its reverse (2221001121), we get a palindrome (123321123321).

The spelling of 121100122200 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, two hundred".