121022222200 has 192 divisors, whose sum is σ = 310480128000. Its totient is φ = 43506048000.

The previous prime is 121022222149. The next prime is 121022222201. The reversal of 121022222200 is 2222220121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022222201) 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, 75214996 + ... + 75216604.

It is an arithmetic number, because the mean of its divisors is an integer number (1617084000).

Almost surely, 2^121022222200 is an apocalyptic number.

121022222200 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 121022222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155240064000).

121022222200 is an abundant number, since it is smaller than the sum of its proper divisors (189457905800).

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

121022222200 is a wasteful number, since it uses less digits than its factorization.

121022222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 1997 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 121022222200 its reverse (2222220121), we get a palindrome (123244442321).

The spelling of 121022222200 in words is "one hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, two hundred".