121982818 has 8 divisors (see below), whose sum is σ = 183061548. Its totient is φ = 60962304.

The previous prime is 121982779. The next prime is 121982827. The reversal of 121982818 is 818289121.

It can be written as a sum of positive squares in 2 ways, for example, as 121947849 + 34969 = 11043^2 + 187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121982818² = 29759615774442248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8871 + ... + 17962.

Almost surely, 2^121982818 is an apocalyptic number.

121982818 is a deficient number, since it is larger than the sum of its proper divisors (61078730).

121982818 is a wasteful number, since it uses less digits than its factorization.

121982818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29108.

The product of its digits is 18432, while the sum is 40.

The square root of 121982818 is about 11044.5831972058. The cubic root of 121982818 is about 495.9442819175.

The spelling of 121982818 in words is "one hundred twenty-one million, nine hundred eighty-two thousand, eight hundred eighteen".