121666023 has 8 divisors (see below), whose sum is σ = 180246000. Its totient is φ = 81110664.

The previous prime is 121666019. The next prime is 121666043. The reversal of 121666023 is 320666121.

It is not a de Polignac number, because 121666023 - 2² = 121666019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4506149 = 121666023 / (1 + 2 + 1 + 6 + 6 + 6 + 0 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121666003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2253048 + ... + 2253101.

It is an arithmetic number, because the mean of its divisors is an integer number (22530750).

Almost surely, 2^121666023 is an apocalyptic number.

121666023 is a deficient number, since it is larger than the sum of its proper divisors (58579977).

121666023 is an equidigital number, since it uses as much as digits as its factorization.

121666023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506158 (or 4506152 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 121666023 is about 11030.2322278364. The cubic root of 121666023 is about 495.5145796650.

The spelling of 121666023 in words is "one hundred twenty-one million, six hundred sixty-six thousand, twenty-three".