121121100010200 has 48 divisors (see below), whose sum is σ = 375475410033480. Its totient is φ = 32298960002560.

The previous prime is 121121100010199. The next prime is 121121100010217. The reversal of 121121100010200 is 2010001121121.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100934249409 + ... + 100934250608.

Almost surely, 2^{121121100010200} is an apocalyptic number.

121121100010200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121100010200 is an abundant number, since it is smaller than the sum of its proper divisors (254354310023280).

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

121121100010200 is a wasteful number, since it uses less digits than its factorization.

121121100010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201868500036 (or 201868500027 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121121100010200 its reverse (2010001121121), we get a palindrome (123131101131321).

The spelling of 121121100010200 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred million, ten thousand, two hundred".