221121110100200 has 48 divisors (see below), whose sum is σ = 514961999866860. Its totient is φ = 88301275200000.

The previous prime is 221121110100127. The next prime is 221121110100269. The reversal of 221121110100200 is 2001011121122.

It can be written as a sum of positive squares in 6 ways, for example, as 74744359012324 + 146376751087876 = 8645482^2 + 12098626^2 .

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, 919684751 + ... + 919925150.

Almost surely, 2^{221121110100200} is an apocalyptic number.

221121110100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221121110100200 is an abundant number, since it is smaller than the sum of its proper divisors (293840889766660).

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

221121110100200 is a wasteful number, since it uses less digits than its factorization.

221121110100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839610518 (or 1839610509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221121110100200 its reverse (2001011121122), we get a palindrome (223122121221322).

The spelling of 221121110100200 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred ten million, one hundred thousand, two hundred".