121334640 has 80 divisors (see below), whose sum is σ = 429877248. Its totient is φ = 27733248.

The previous prime is 121334623. The next prime is 121334659. The reversal of 121334640 is 46433121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 121334640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34432 + ... + 37791.

Almost surely, 2^121334640 is an apocalyptic number.

121334640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121334640 is an abundant number, since it is smaller than the sum of its proper divisors (308542608).

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

121334640 is a wasteful number, since it uses less digits than its factorization.

121334640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72246 (or 72240 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 121334640 is about 11015.2004067107. The cubic root of 121334640 is about 495.0642912107.

Adding to 121334640 its reverse (46433121), we get a palindrome (167767761).

It can be divided in two parts, 1213 and 34640, that added together give a palindrome (35853).

The spelling of 121334640 in words is "one hundred twenty-one million, three hundred thirty-four thousand, six hundred forty".