121001220200 has 48 divisors (see below), whose sum is σ = 321517531680. Its totient is φ = 41486132160.

The previous prime is 121001220199. The next prime is 121001220203. The reversal of 121001220200 is 2022100121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121001220203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43213322 + ... + 43216121.

It is an arithmetic number, because the mean of its divisors is an integer number (6698281910).

Almost surely, 2^121001220200 is an apocalyptic number.

121001220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001220200 is an abundant number, since it is smaller than the sum of its proper divisors (200516311480).

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

121001220200 is a wasteful number, since it uses less digits than its factorization.

121001220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86429466 (or 86429457 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121001220200 its reverse (2022100121), we get a palindrome (123023320321).

The spelling of 121001220200 in words is "one hundred twenty-one billion, one million, two hundred twenty thousand, two hundred".