121121012200 has 24 divisors (see below), whose sum is σ = 281606353830. Its totient is φ = 48448404800.

The previous prime is 121121012141. The next prime is 121121012209. The reversal of 121121012200 is 2210121121.

It can be written as a sum of positive squares in 3 ways, for example, as 116596297444 + 4524714756 = 341462^2 + 67266^2 .

It is not an unprimeable number, because it can be changed into a prime (121121012209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302802331 + ... + 302802730.

Almost surely, 2^121121012200 is an apocalyptic number.

121121012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121012200 is an abundant number, since it is smaller than the sum of its proper divisors (160485341630).

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

121121012200 is a wasteful number, since it uses less digits than its factorization.

121121012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605605077 (or 605605068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121121012200 its reverse (2210121121), we get a palindrome (123331133321).

The spelling of 121121012200 in words is "one hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred".