121499718 has 16 divisors (see below), whose sum is σ = 255789120. Its totient is φ = 38368296.

The previous prime is 121499717. The next prime is 121499723. The reversal of 121499718 is 817994121.

It is a self number, because there is not a number n which added to its sum of digits gives 121499718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121499717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532780 + ... + 533007.

It is an arithmetic number, because the mean of its divisors is an integer number (15986820).

Almost surely, 2^121499718 is an apocalyptic number.

121499718 is an abundant number, since it is smaller than the sum of its proper divisors (134289402).

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

121499718 is a wasteful number, since it uses less digits than its factorization.

121499718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065811.

The product of its digits is 36288, while the sum is 42.

The square root of 121499718 is about 11022.6910507371. The cubic root of 121499718 is about 495.2887041473.

The spelling of 121499718 in words is "one hundred twenty-one million, four hundred ninety-nine thousand, seven hundred eighteen".