121321044 has 216 divisors, whose sum is σ = 377536320. Its totient is φ = 33606144.

The previous prime is 121321043. The next prime is 121321049. The reversal of 121321044 is 440123121.

It is a super-3 number, since 3×121321044³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321043) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5274817 + ... + 5274839.

Almost surely, 2^121321044 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 121321044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188768160).

121321044 is an abundant number, since it is smaller than the sum of its proper divisors (256215276).

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

121321044 is a wasteful number, since it uses less digits than its factorization.

121321044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121321044 is about 11014.5832422294. The cubic root of 121321044 is about 495.0457992518.

Adding to 121321044 its reverse (440123121), we get a palindrome (561444165).

The spelling of 121321044 in words is "one hundred twenty-one million, three hundred twenty-one thousand, forty-four".