121415444 has 6 divisors (see below), whose sum is σ = 212477034. Its totient is φ = 60707720.

The previous prime is 121415443. The next prime is 121415447. The reversal of 121415444 is 444514121.

121415444 is digitally balanced in base 9, 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 only one way, i.e., 111555844 + 9859600 = 10562^2 + 3140^2 .

121415444 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121415443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15176927 + ... + 15176934.

It is an arithmetic number, because the mean of its divisors is an integer number (35412839).

Almost surely, 2^121415444 is an apocalyptic number.

It is an amenable number.

121415444 is a deficient number, since it is larger than the sum of its proper divisors (91061590).

121415444 is a wasteful number, since it uses less digits than its factorization.

121415444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30353865 (or 30353863 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 121415444 is about 11018.8676369217. The cubic root of 121415444 is about 495.1741644728.

Adding to 121415444 its reverse (444514121), we get a palindrome (565929565).

The spelling of 121415444 in words is "one hundred twenty-one million, four hundred fifteen thousand, four hundred forty-four".