121724020236 has 192 divisors, whose sum is σ = 355893350400. Its totient is φ = 31525853184.

The previous prime is 121724020213. The next prime is 121724020241. The reversal of 121724020236 is 632020427121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19048930 + ... + 19055318.

It is an arithmetic number, because the mean of its divisors is an integer number (1853611200).

Almost surely, 2^121724020236 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 121724020236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177946675200).

121724020236 is an abundant number, since it is smaller than the sum of its proper divisors (234169330164).

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

121724020236 is a wasteful number, since it uses less digits than its factorization.

121724020236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6728 (or 6726 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

Adding to 121724020236 its reverse (632020427121), we get a palindrome (753744447357).

The spelling of 121724020236 in words is "one hundred twenty-one billion, seven hundred twenty-four million, twenty thousand, two hundred thirty-six".