121021012012200 has 48 divisors (see below), whose sum is σ = 375165137239680. Its totient is φ = 32272269869760.

The previous prime is 121021012012141. The next prime is 121021012012211. The reversal of 121021012012200 is 2210210120121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121021012012200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 100850842744 + ... + 100850843943.

It is an arithmetic number, because the mean of its divisors is an integer number (7815940359160).

Almost surely, 2^{121021012012200} is an apocalyptic number.

121021012012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021012012200 is an abundant number, since it is smaller than the sum of its proper divisors (254144125227480).

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

121021012012200 is a wasteful number, since it uses less digits than its factorization.

121021012012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201701686706 (or 201701686697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121021012012200 its reverse (2210210120121), we get a palindrome (123231222132321).

The spelling of 121021012012200 in words is "one hundred twenty-one trillion, twenty-one billion, twelve million, twelve thousand, two hundred".