121231104 has 72 divisors (see below), whose sum is σ = 330244992. Its totient is φ = 39459840.

The previous prime is 121231093. The next prime is 121231133. The reversal of 121231104 is 401132121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31189 + ... + 34859.

It is an arithmetic number, because the mean of its divisors is an integer number (4586736).

Almost surely, 2^121231104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121231104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165122496).

121231104 is an abundant number, since it is smaller than the sum of its proper divisors (209013888).

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

121231104 is an equidigital number, since it uses as much as digits as its factorization.

121231104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121231104 is about 11010.4997161800. The cubic root of 121231104 is about 494.9234367860.

Adding to 121231104 its reverse (401132121), we get a palindrome (522363225).

The spelling of 121231104 in words is "one hundred twenty-one million, two hundred thirty-one thousand, one hundred four".