121066399 has 4 divisors (see below), whose sum is σ = 124019280. Its totient is φ = 118113520.

The previous prime is 121066397. The next prime is 121066403. The reversal of 121066399 is 993660121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993660121 = 2417 ⋅411113.

It is a cyclic number.

It is not a de Polignac number, because 121066399 - 2¹ = 121066397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121066397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1476379 + ... + 1476460.

It is an arithmetic number, because the mean of its divisors is an integer number (31004820).

Almost surely, 2^121066399 is an apocalyptic number.

121066399 is a deficient number, since it is larger than the sum of its proper divisors (2952881).

121066399 is an equidigital number, since it uses as much as digits as its factorization.

121066399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952880.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 121066399 is about 11003.0177224251. The cubic root of 121066399 is about 494.6992003044.

The spelling of 121066399 in words is "one hundred twenty-one million, sixty-six thousand, three hundred ninety-nine".