121000111100 has 72 divisors (see below), whose sum is σ = 301516118400. Its totient is φ = 41684241600.

The previous prime is 121000111093. The next prime is 121000111109. The reversal of 121000111100 is 1111000121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000111109) 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, 2873840 + ... + 2915639.

Almost surely, 2^121000111100 is an apocalyptic number.

121000111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000111100 is an abundant number, since it is smaller than the sum of its proper divisors (180516007300).

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

121000111100 is a wasteful number, since it uses less digits than its factorization.

121000111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789523 (or 5789516 counting only the distinct ones).

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

Adding to 121000111100 its reverse (1111000121), we get a palindrome (122111111221).

The spelling of 121000111100 in words is "one hundred twenty-one billion, one hundred eleven thousand, one hundred".