121243536 has 60 divisors (see below), whose sum is σ = 341099200. Its totient is φ = 40201920.

The previous prime is 121243523. The next prime is 121243567. The reversal of 121243536 is 635342121.

121243536 is a `hidden beast` number, since 1 + 2 + 124 + 3 + 536 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26541 + ... + 30771.

Almost surely, 2^121243536 is an apocalyptic number.

121243536 is a gapful number since it is divisible by the number (16) 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 121243536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170549600).

121243536 is an abundant number, since it is smaller than the sum of its proper divisors (219855664).

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

121243536 is a wasteful number, since it uses less digits than its factorization.

121243536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444 (or 4435 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 121243536 is about 11011.0642537404. The cubic root of 121243536 is about 494.9403540008.

Adding to 121243536 its reverse (635342121), we get a palindrome (756585657).

The spelling of 121243536 in words is "one hundred twenty-one million, two hundred forty-three thousand, five hundred thirty-six".