121108906 has 8 divisors (see below), whose sum is σ = 181837764. Its totient is φ = 60496320.

The previous prime is 121108903. The next prime is 121108921. The reversal of 121108906 is 609801121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114682681 + 6426225 = 10709^2 + 2535^2 .

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

It is a super-2 number, since 2×121108906² = 29334734225033672, which contains 22 as substring.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (121108903) 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, 26415 + ... + 30658.

Almost surely, 2^121108906 is an apocalyptic number.

121108906 is a deficient number, since it is larger than the sum of its proper divisors (60728858).

121108906 is a wasteful number, since it uses less digits than its factorization.

121108906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58136.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 121108906 is about 11004.9491593555. The cubic root of 121108906 is about 494.7570906261.

The spelling of 121108906 in words is "one hundred twenty-one million, one hundred eight thousand, nine hundred six".