121200440 has 32 divisors (see below), whose sum is σ = 276443280. Its totient is φ = 47814912.

The previous prime is 121200439. The next prime is 121200461. The reversal of 121200440 is 44002121.

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, 17834 + ... + 23673.

Almost surely, 2^121200440 is an apocalyptic number.

121200440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200440 is an abundant number, since it is smaller than the sum of its proper divisors (155242840).

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

121200440 is a wasteful number, since it uses less digits than its factorization.

121200440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41591 (or 41587 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 121200440 is about 11009.1071390917. The cubic root of 121200440 is about 494.8817048886.

Adding to 121200440 its reverse (44002121), we get a palindrome (165202561).

The spelling of 121200440 in words is "one hundred twenty-one million, two hundred thousand, four hundred forty".