121116440 has 32 divisors (see below), whose sum is σ = 275022000. Its totient is φ = 48000384.

The previous prime is 121116427. The next prime is 121116461. The reversal of 121116440 is 44611121.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 9530 + ... + 18249.

Almost surely, 2^121116440 is an apocalyptic number.

121116440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121116440 is an abundant number, since it is smaller than the sum of its proper divisors (153905560).

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

121116440 is a wasteful number, since it uses less digits than its factorization.

121116440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27899 (or 27895 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 121116440 is about 11005.2914545686. The cubic root of 121116440 is about 494.7673497742.

Adding to 121116440 its reverse (44611121), we get a palindrome (165727561).

The spelling of 121116440 in words is "one hundred twenty-one million, one hundred sixteen thousand, four hundred forty".