121920036 has 96 divisors (see below), whose sum is σ = 349440000. Its totient is φ = 32979744.

The previous prime is 121920013. The next prime is 121920049. The reversal of 121920036 is 630029121.

It is a junction number, because it is equal to n+sod(n) for n = 121919988 and 121920015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77425 + ... + 78983.

It is an arithmetic number, because the mean of its divisors is an integer number (3640000).

Almost surely, 2^121920036 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 121920036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174720000).

121920036 is an abundant number, since it is smaller than the sum of its proper divisors (227519964).

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

121920036 is a wasteful number, since it uses less digits than its factorization.

121920036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 121920036 is about 11041.7406236517. The cubic root of 121920036 is about 495.8591832736.

Adding to 121920036 its reverse (630029121), we get a palindrome (751949157).

The spelling of 121920036 in words is "one hundred twenty-one million, nine hundred twenty thousand, thirty-six".