121165606 has 16 divisors (see below), whose sum is σ = 183881088. Its totient is φ = 59875200.

The previous prime is 121165553. The next prime is 121165609. The reversal of 121165606 is 606561121.

It is a super-2 number, since 2×121165606² = 29362208154694472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121165609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121771 + ... + 122761.

It is an arithmetic number, because the mean of its divisors is an integer number (11492568).

Almost surely, 2^121165606 is an apocalyptic number.

121165606 is a deficient number, since it is larger than the sum of its proper divisors (62715482).

121165606 is a wasteful number, since it uses less digits than its factorization.

121165606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 121165606 is about 11007.5249715819. The cubic root of 121165606 is about 494.8342893261.

It can be divided in two parts, 121165 and 606, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 121165606 in words is "one hundred twenty-one million, one hundred sixty-five thousand, six hundred six".