121649886 has 24 divisors (see below), whose sum is σ = 265997160. Its totient is φ = 40177296.

The previous prime is 121649839. The next prime is 121649887. The reversal of 121649886 is 688946121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121649887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29040 + ... + 32963.

It is an arithmetic number, because the mean of its divisors is an integer number (11083215).

Almost surely, 2^121649886 is an apocalyptic number.

121649886 is an abundant number, since it is smaller than the sum of its proper divisors (144347274).

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

121649886 is a wasteful number, since it uses less digits than its factorization.

121649886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62120 (or 62117 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 121649886 is about 11029.5007139943. The cubic root of 121649886 is about 495.4926714058.

The spelling of 121649886 in words is "one hundred twenty-one million, six hundred forty-nine thousand, eight hundred eighty-six".