121221002200 has 48 divisors (see below), whose sum is σ = 282961811160. Its totient is φ = 48295200000.

The previous prime is 121221002197. The next prime is 121221002261. The reversal of 121221002200 is 2200122121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1157181 + ... + 1257580.

Almost surely, 2^121221002200 is an apocalyptic number.

121221002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221002200 is an abundant number, since it is smaller than the sum of its proper divisors (161740808960).

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

121221002200 is a wasteful number, since it uses less digits than its factorization.

121221002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415028 (or 2415019 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121221002200 its reverse (2200122121), we get a palindrome (123421124321).

The spelling of 121221002200 in words is "one hundred twenty-one billion, two hundred twenty-one million, two thousand, two hundred".