121329240 has 32 divisors (see below), whose sum is σ = 363988080. Its totient is φ = 32354432.

The previous prime is 121329239. The next prime is 121329259. The reversal of 121329240 is 42923121.

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 121329240.

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, 505419 + ... + 505658.

Almost surely, 2^121329240 is an apocalyptic number.

121329240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121329240 is an abundant number, since it is smaller than the sum of its proper divisors (242658840).

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

121329240 is a wasteful number, since it uses less digits than its factorization.

121329240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011091 (or 1011087 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 121329240 is about 11014.9552881526. The cubic root of 121329240 is about 495.0569468205.

The spelling of 121329240 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, two hundred forty".