121316536 has 48 divisors (see below), whose sum is σ = 260946000. Its totient is φ = 52736640.

The previous prime is 121316521. The next prime is 121316537. The reversal of 121316536 is 635613121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121316537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19540 + ... + 24988.

It is an arithmetic number, because the mean of its divisors is an integer number (5436375).

Almost surely, 2^121316536 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 121316536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130473000).

121316536 is an abundant number, since it is smaller than the sum of its proper divisors (139629464).

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

121316536 is a wasteful number, since it uses less digits than its factorization.

121316536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500 (or 5485 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 121316536 is about 11014.3786025359. The cubic root of 121316536 is about 495.0396676030.

Adding to 121316536 its reverse (635613121), we get a palindrome (756929657).

The spelling of 121316536 in words is "one hundred twenty-one million, three hundred sixteen thousand, five hundred thirty-six".