121212544 has 32 divisors (see below), whose sum is σ = 244555200. Its totient is φ = 59834112.

The previous prime is 121212529. The next prime is 121212557. The reversal of 121212544 is 445212121.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4119 + ... + 16105.

It is an arithmetic number, because the mean of its divisors is an integer number (7642350).

Almost surely, 2^121212544 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 121212544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122277600).

121212544 is an abundant number, since it is smaller than the sum of its proper divisors (123342656).

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

121212544 is an equidigital number, since it uses as much as digits as its factorization.

121212544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080 (or 12068 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 121212544 is about 11009.6568520549. The cubic root of 121212544 is about 494.8981785602.

Adding to 121212544 its reverse (445212121), we get a palindrome (566424665).

The spelling of 121212544 in words is "one hundred twenty-one million, two hundred twelve thousand, five hundred forty-four".