121100012200 has 24 divisors (see below), whose sum is σ = 281557528830. Its totient is φ = 48440004800.

The previous prime is 121100012167. The next prime is 121100012233. The reversal of 121100012200 is 2210001121.

It is an interprime number because it is at equal distance from previous prime (121100012167) and next prime (121100012233).

It can be written as a sum of positive squares in 3 ways, for example, as 97340256036 + 23759756164 = 311994^2 + 154142^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302749831 + ... + 302750230.

Almost surely, 2^121100012200 is an apocalyptic number.

121100012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100012200 is an abundant number, since it is smaller than the sum of its proper divisors (160457516630).

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

121100012200 is a wasteful number, since it uses less digits than its factorization.

121100012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605500077 (or 605500068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121100012200 its reverse (2210001121), we get a palindrome (123310013321).

The spelling of 121100012200 in words is "one hundred twenty-one billion, one hundred million, twelve thousand, two hundred".