121471866 has 32 divisors (see below), whose sum is σ = 275037120. Its totient is φ = 39725712.

The previous prime is 121471859. The next prime is 121471873. The reversal of 121471866 is 668174121.

It is a happy number.

121471866 is a `hidden beast` number, since 121 + 471 + 8 + 66 = 666.

It is an interprime number because it is at equal distance from previous prime (121471859) and next prime (121471873).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 121471866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18360 + ... + 24083.

It is an arithmetic number, because the mean of its divisors is an integer number (8594910).

Almost surely, 2^121471866 is an apocalyptic number.

121471866 is an abundant number, since it is smaller than the sum of its proper divisors (153565254).

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

121471866 is a wasteful number, since it uses less digits than its factorization.

121471866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42507 (or 42501 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 121471866 is about 11021.4275844829. The cubic root of 121471866 is about 495.2508554032.

The spelling of 121471866 in words is "one hundred twenty-one million, four hundred seventy-one thousand, eight hundred sixty-six".