121222123200 has 252 divisors, whose sum is σ = 442498642560. Its totient is φ = 31452088320.

The previous prime is 121222123157. The next prime is 121222123223. The reversal of 121222123200 is 2321222121.

121222123200 is a `hidden beast` number, since 1 + 212 + 221 + 232 + 0 + 0 = 666.

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 35 ways as a sum of consecutive naturals, for example, 419041 + ... + 646559.

Almost surely, 2^121222123200 is an apocalyptic number.

121222123200 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 121222123200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221249321280).

121222123200 is an abundant number, since it is smaller than the sum of its proper divisors (321276519360).

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

121222123200 is a wasteful number, since it uses less digits than its factorization.

121222123200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227584 (or 227566 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121222123200 its reverse (2321222121), we get a palindrome (123543345321).

The spelling of 121222123200 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-three thousand, two hundred".