121002240 has 72 divisors (see below), whose sum is σ = 386463168. Its totient is φ = 32266240.

The previous prime is 121002199. The next prime is 121002251. The reversal of 121002240 is 42200121.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 7 ways as a sum of consecutive naturals, for example, 11916 + ... + 19595.

It is an arithmetic number, because the mean of its divisors is an integer number (5367544).

Almost surely, 2^121002240 is an apocalyptic number.

121002240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002240 is an abundant number, since it is smaller than the sum of its proper divisors (265460928).

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

121002240 is an equidigital number, since it uses as much as digits as its factorization.

121002240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31535 (or 31521 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 121002240 is about 11000.1018177106. The cubic root of 121002240 is about 494.6117964371.

Adding to 121002240 its reverse (42200121), we get a palindrome (163202361).

The spelling of 121002240 in words is "one hundred twenty-one million, two thousand, two hundred forty".