121020212020200 has 48 divisors (see below), whose sum is σ = 375162657264480. Its totient is φ = 32272056538560.

The previous prime is 121020212020139. The next prime is 121020212020297. The reversal of 121020212020200 is 2020212020121.

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 121020212020200.

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, 100850176084 + ... + 100850177283.

It is an arithmetic number, because the mean of its divisors is an integer number (7815888693010).

Almost surely, 2^{121020212020200} is an apocalyptic number.

121020212020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020212020200 is an abundant number, since it is smaller than the sum of its proper divisors (254142445244280).

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

121020212020200 is a wasteful number, since it uses less digits than its factorization.

121020212020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201700353386 (or 201700353377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121020212020200 its reverse (2020212020121), we get a palindrome (123040424040321).

The spelling of 121020212020200 in words is "one hundred twenty-one trillion, twenty billion, two hundred twelve million, twenty thousand, two hundred".