121101001100 has 72 divisors (see below), whose sum is σ = 292892034960. Its totient is φ = 43191429120.

The previous prime is 121101001061. The next prime is 121101001127. The reversal of 121101001100 is 1100101121.

It is a happy number.

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, 1842329 + ... + 1906928.

It is an arithmetic number, because the mean of its divisors is an integer number (4067944930).

Almost surely, 2^121101001100 is an apocalyptic number.

121101001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101001100 is an abundant number, since it is smaller than the sum of its proper divisors (171791033860).

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

121101001100 is a wasteful number, since it uses less digits than its factorization.

121101001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749307 (or 3749300 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 121101001100 its reverse (1100101121), we get a palindrome (122201102221).

The spelling of 121101001100 in words is "one hundred twenty-one billion, one hundred one million, one thousand, one hundred".