121111000100 has 36 divisors (see below), whose sum is σ = 263938864644. Its totient is φ = 48236474880.

The previous prime is 121111000099. The next prime is 121111000103. The reversal of 121111000100 is 1000111121.

It is a happy number.

121111000100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 23906725924 + 97204274176 = 154618^2 + 311776^2 .

It is not an unprimeable number, because it can be changed into a prime (121111000103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2575649 + ... + 2622248.

It is an arithmetic number, because the mean of its divisors is an integer number (7331635129).

Almost surely, 2^121111000100 is an apocalyptic number.

121111000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111000100 is an abundant number, since it is smaller than the sum of its proper divisors (142827864544).

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

121111000100 is a wasteful number, since it uses less digits than its factorization.

121111000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198144 (or 5198137 counting only the distinct ones).

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

Adding to 121111000100 its reverse (1000111121), we get a palindrome (122111111221).

The spelling of 121111000100 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred", and thus it is an aban number.