121865110 has 16 divisors (see below), whose sum is σ = 222448032. Its totient is φ = 48059200.

The previous prime is 121865101. The next prime is 121865111. The reversal of 121865110 is 11568121.

It is a happy number.

It is a super-2 number, since 2×121865110² = 29702210070624200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121865111) by changing a digit.

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, 85111 + ... + 86530.

It is an arithmetic number, because the mean of its divisors is an integer number (13903002).

Almost surely, 2^121865110 is an apocalyptic number.

121865110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121865110 is a deficient number, since it is larger than the sum of its proper divisors (100582922).

121865110 is a wasteful number, since it uses less digits than its factorization.

121865110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171719.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 121865110 is about 11039.2531450275. The cubic root of 121865110 is about 495.7847091801.

The spelling of 121865110 in words is "one hundred twenty-one million, eight hundred sixty-five thousand, one hundred ten".