121110211121200 has 120 divisors (see below), whose sum is σ = 335826453811680. Its totient is φ = 41112377088000.

The previous prime is 121110211121191. The next prime is 121110211121219. The reversal of 121110211121200 is 2121112011121.

It is a super-2 number, since 2×121110211121200² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213844165 + ... + 214409764.

It is an arithmetic number, because the mean of its divisors is an integer number (2798553781764).

Almost surely, 2^{121110211121200} is an apocalyptic number.

121110211121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110211121200 is an abundant number, since it is smaller than the sum of its proper divisors (214716242690480).

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

121110211121200 is a wasteful number, since it uses less digits than its factorization.

121110211121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428254055 (or 428254044 counting only the distinct ones).

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

Adding to 121110211121200 its reverse (2121112011121), we get a palindrome (123231323132321).

The spelling of 121110211121200 in words is "one hundred twenty-one trillion, one hundred ten billion, two hundred eleven million, one hundred twenty-one thousand, two hundred".