121222210200 has 192 divisors, whose sum is σ = 462509564160. Its totient is φ = 25576542720.

The previous prime is 121222210147. The next prime is 121222210201. The reversal of 121222210200 is 2012222121.

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 121222210200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222210201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1055494 + ... + 1164693.

It is an arithmetic number, because the mean of its divisors is an integer number (2408903980).

Almost surely, 2^121222210200 is an apocalyptic number.

121222210200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222210200 is an abundant number, since it is smaller than the sum of its proper divisors (341287353960).

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

121222210200 is a wasteful number, since it uses less digits than its factorization.

121222210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220226 (or 2220217 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121222210200 its reverse (2012222121), we get a palindrome (123234432321).

The spelling of 121222210200 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, two hundred".