121012544 has 56 divisors (see below), whose sum is σ = 246281448. Its totient is φ = 58982400.

The previous prime is 121012517. The next prime is 121012571. The reversal of 121012544 is 445210121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121012517) and next prime (121012571).

It can be written as a sum of positive squares in 4 ways, for example, as 30382144 + 90630400 = 5512^2 + 9520^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626912 + ... + 627104.

It is an arithmetic number, because the mean of its divisors is an integer number (4397883).

Almost surely, 2^121012544 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 121012544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123140724).

121012544 is an abundant number, since it is smaller than the sum of its proper divisors (125268904).

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

121012544 is a wasteful number, since it uses less digits than its factorization.

121012544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 393 counting only the distinct ones).

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

The square root of 121012544 is about 11000.5701670413. The cubic root of 121012544 is about 494.6258356684.

Adding to 121012544 its reverse (445210121), we get a palindrome (566222665).

The spelling of 121012544 in words is "one hundred twenty-one million, twelve thousand, five hundred forty-four".