121243808 has 24 divisors (see below), whose sum is σ = 272799072. Its totient is φ = 51961536.

The previous prime is 121243781. The next prime is 121243819. The reversal of 121243808 is 808342121.

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, 270410 + ... + 270857.

It is an arithmetic number, because the mean of its divisors is an integer number (11366628).

Almost surely, 2^121243808 is an apocalyptic number.

It is an amenable number.

121243808 is an abundant number, since it is smaller than the sum of its proper divisors (151555264).

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

121243808 is an equidigital number, since it uses as much as digits as its factorization.

121243808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541284 (or 541276 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 121243808 is about 11011.0766049465. The cubic root of 121243808 is about 494.9407241199.

Adding to 121243808 its reverse (808342121), we get a palindrome (929585929).

The spelling of 121243808 in words is "one hundred twenty-one million, two hundred forty-three thousand, eight hundred eight".