121101121121200 has 120 divisors (see below), whose sum is σ = 320537555484336. Its totient is φ = 43600763520000.

The previous prime is 121101121121191. The next prime is 121101121121209. The reversal of 121101121121200 is 2121121101121.

It is an interprime number because it is at equal distance from previous prime (121101121121191) and next prime (121101121121209).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (121101121121209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135807987 + ... + 136696786.

Almost surely, 2^{121101121121200} is an apocalyptic number.

121101121121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101121121200 is an abundant number, since it is smaller than the sum of its proper divisors (199436434363136).

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

121101121121200 is a wasteful number, since it uses less digits than its factorization.

121101121121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272504903 (or 272504892 counting only the distinct ones).

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

Adding to 121101121121200 its reverse (2121121101121), we get a palindrome (123222242222321).

The spelling of 121101121121200 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred".