121021102200 has 192 divisors, whose sum is σ = 394705674720. Its totient is φ = 30633984000.

The previous prime is 121021102187. The next prime is 121021102217. The reversal of 121021102200 is 2201120121.

It is a super-2 number, since 2×121021102200² (a number of 23 digits) contains 22 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, 843720 + ... + 976680.

Almost surely, 2^121021102200 is an apocalyptic number.

121021102200 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 121021102200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197352837360).

121021102200 is an abundant number, since it is smaller than the sum of its proper divisors (273684572520).

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

121021102200 is a wasteful number, since it uses less digits than its factorization.

121021102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133058 (or 133049 counting only the distinct ones).

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

Adding to 121021102200 its reverse (2201120121), we get a palindrome (123222222321).

The spelling of 121021102200 in words is "one hundred twenty-one billion, twenty-one million, one hundred two thousand, two hundred".