121686522 has 8 divisors (see below), whose sum is σ = 243373056. Its totient is φ = 40562172.

The previous prime is 121686503. The next prime is 121686529. The reversal of 121686522 is 225686121.

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

121686522 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (121686529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10140538 + ... + 10140549.

It is an arithmetic number, because the mean of its divisors is an integer number (30421632).

Almost surely, 2^121686522 is an apocalyptic number.

121686522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121686522 is a wasteful number, since it uses less digits than its factorization.

121686522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20281092.

The product of its digits is 11520, while the sum is 33.

The square root of 121686522 is about 11031.1614075763. The cubic root of 121686522 is about 495.5424071628.

The spelling of 121686522 in words is "one hundred twenty-one million, six hundred eighty-six thousand, five hundred twenty-two".