121102100200 has 24 divisors (see below), whose sum is σ = 281562383430. Its totient is φ = 48440840000.

The previous prime is 121102100143. The next prime is 121102100213. The reversal of 121102100200 is 2001201121.

It can be written as a sum of positive squares in 3 ways, for example, as 80848098244 + 40254001956 = 284338^2 + 200634^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302755051 + ... + 302755450.

Almost surely, 2^121102100200 is an apocalyptic number.

121102100200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102100200 is an abundant number, since it is smaller than the sum of its proper divisors (160460283230).

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

121102100200 is a wasteful number, since it uses less digits than its factorization.

121102100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605510517 (or 605510508 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121102100200 its reverse (2001201121), we get a palindrome (123103301321).

The spelling of 121102100200 in words is "one hundred twenty-one billion, one hundred two million, one hundred thousand, two hundred".