121001166 has 96 divisors (see below), whose sum is σ = 318820320. Its totient is φ = 32659200.

The previous prime is 121001161. The next prime is 121001197. The reversal of 121001166 is 661100121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73836 + ... + 75456.

It is an arithmetic number, because the mean of its divisors is an integer number (3321045).

Almost surely, 2^121001166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121001166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159410160).

121001166 is an abundant number, since it is smaller than the sum of its proper divisors (197819154).

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

121001166 is a wasteful number, since it uses less digits than its factorization.

121001166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 121001166 is about 11000.0529998723. The cubic root of 121001166 is about 494.6103330630.

Adding to 121001166 its reverse (661100121), we get a palindrome (782101287).

The spelling of 121001166 in words is "one hundred twenty-one million, one thousand, one hundred sixty-six".