121564122 has 8 divisors (see below), whose sum is σ = 243128256. Its totient is φ = 40521372.

The previous prime is 121564099. The next prime is 121564133. The reversal of 121564122 is 221465121.

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

121564122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 121564092 and 121564101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10130338 + ... + 10130349.

It is an arithmetic number, because the mean of its divisors is an integer number (30391032).

Almost surely, 2^121564122 is an apocalyptic number.

121564122 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.

121564122 is a wasteful number, since it uses less digits than its factorization.

121564122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20260692.

The product of its digits is 960, while the sum is 24.

The square root of 121564122 is about 11025.6120918523. The cubic root of 121564122 is about 495.3762021258.

Subtracting 121564122 from its reverse (221465121), we obtain a palindrome (99900999).

The spelling of 121564122 in words is "one hundred twenty-one million, five hundred sixty-four thousand, one hundred twenty-two".