121123560636 has 144 divisors (see below), whose sum is σ = 347330314240. Its totient is φ = 35281733760.

The previous prime is 121123560631. The next prime is 121123560673. The reversal of 121123560636 is 636065321121.

121123560636 is a `hidden beast` number, since 1 + 2 + 1 + 12 + 3 + 5 + 6 + 0 + 636 = 666.

121123560636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121123560636² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 121123560636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123560631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14783301 + ... + 14791491.

Almost surely, 2^121123560636 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 121123560636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173665157120).

121123560636 is an abundant number, since it is smaller than the sum of its proper divisors (226206753604).

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

121123560636 is a wasteful number, since it uses less digits than its factorization.

121123560636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896 (or 9891 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 121123560636 its reverse (636065321121), we get a palindrome (757188881757).

The spelling of 121123560636 in words is "one hundred twenty-one billion, one hundred twenty-three million, five hundred sixty thousand, six hundred thirty-six".