121121024200 has 72 divisors (see below), whose sum is σ = 309534348690. Its totient is φ = 44044000000.

The previous prime is 121121024183. The next prime is 121121024207. The reversal of 121121024200 is 2420121121.

It can be written as a sum of positive squares in 3 ways, for example, as 63331748964 + 57789275236 = 251658^2 + 240394^2 .

It is not an unprimeable number, because it can be changed into a prime (121121024207) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2478301 + ... + 2526700.

Almost surely, 2^121121024200 is an apocalyptic number.

121121024200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121024200 is an abundant number, since it is smaller than the sum of its proper divisors (188413324490).

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

121121024200 is a wasteful number, since it uses less digits than its factorization.

121121024200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005039 (or 5005019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121121024200 its reverse (2420121121), we get a palindrome (123541145321).

The spelling of 121121024200 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-four thousand, two hundred".