121928166 has 56 divisors (see below), whose sum is σ = 276144264. Its totient is φ = 40357440.

The previous prime is 121928123. The next prime is 121928171. The reversal of 121928166 is 661829121.

It is a self number, because there is not a number n which added to its sum of digits gives 121928166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 351205 + ... + 351551.

Almost surely, 2^121928166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121928166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138072132).

121928166 is an abundant number, since it is smaller than the sum of its proper divisors (154216098).

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

121928166 is an equidigital number, since it uses as much as digits as its factorization.

121928166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 593 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 121928166 is about 11042.1087659921. The cubic root of 121928166 is about 495.8702048297.

The spelling of 121928166 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, one hundred sixty-six".