121210544 has 160 divisors (see below), whose sum is σ = 314979840. Its totient is φ = 43831296.

The previous prime is 121210511. The next prime is 121210553. The reversal of 121210544 is 445012121.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 1460327 + ... + 1460409.

It is an arithmetic number, because the mean of its divisors is an integer number (1968624).

Almost surely, 2^121210544 is an apocalyptic number.

121210544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121210544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157489920).

121210544 is an abundant number, since it is smaller than the sum of its proper divisors (193769296).

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

121210544 is a wasteful number, since it uses less digits than its factorization.

121210544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 121210544 is about 11009.5660223280. The cubic root of 121210544 is about 494.8954566148.

Adding to 121210544 its reverse (445012121), we get a palindrome (566222665).

The spelling of 121210544 in words is "one hundred twenty-one million, two hundred ten thousand, five hundred forty-four".