121438806 has 16 divisors (see below), whose sum is σ = 243000000. Its totient is φ = 40459208.

The previous prime is 121438799. The next prime is 121438813. The reversal of 121438806 is 608834121.

It is an interprime number because it is at equal distance from previous prime (121438799) and next prime (121438813).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12445 + ... + 19943.

It is an arithmetic number, because the mean of its divisors is an integer number (15187500).

Almost surely, 2^121438806 is an apocalyptic number.

121438806 is an abundant number, since it is smaller than the sum of its proper divisors (121561194).

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

121438806 is a wasteful number, since it uses less digits than its factorization.

121438806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 121438806 is about 11019.9276767137. The cubic root of 121438806 is about 495.2059218741.

The spelling of 121438806 in words is "one hundred twenty-one million, four hundred thirty-eight thousand, eight hundred six".