121036640 has 48 divisors (see below), whose sum is σ = 286892928. Its totient is φ = 48254976.

The previous prime is 121036621. The next prime is 121036661. The reversal of 121036640 is 46630121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55409 + ... + 57551.

It is an arithmetic number, because the mean of its divisors is an integer number (5976936).

Almost surely, 2^121036640 is an apocalyptic number.

121036640 is a gapful number since it is divisible by the number (10) 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 121036640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143446464).

121036640 is an abundant number, since it is smaller than the sum of its proper divisors (165856288).

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

121036640 is a wasteful number, since it uses less digits than its factorization.

121036640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511 (or 2503 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 121036640 is about 11001.6653284855. The cubic root of 121036640 is about 494.6586634309.

Adding to 121036640 its reverse (46630121), we get a palindrome (167666761).

The spelling of 121036640 in words is "one hundred twenty-one million, thirty-six thousand, six hundred forty".