121142166 has 16 divisors (see below), whose sum is σ = 243890688. Its totient is φ = 40113000.

The previous prime is 121142159. The next prime is 121142179. The reversal of 121142166 is 661241121.

It is a happy number.

It is a super-3 number, since 3×121142166³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65950 + ... + 67761.

It is an arithmetic number, because the mean of its divisors is an integer number (15243168).

Almost surely, 2^121142166 is an apocalyptic number.

121142166 is an abundant number, since it is smaller than the sum of its proper divisors (122748522).

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

121142166 is a wasteful number, since it uses less digits than its factorization.

121142166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133867.

The product of its digits is 576, while the sum is 24.

The square root of 121142166 is about 11006.4601939043. The cubic root of 121142166 is about 494.8023780048.

Adding to 121142166 its reverse (661241121), we get a palindrome (782383287).

The spelling of 121142166 in words is "one hundred twenty-one million, one hundred forty-two thousand, one hundred sixty-six".