121683427 has 4 divisors (see below), whose sum is σ = 121752000. Its totient is φ = 121614856.

The previous prime is 121683413. The next prime is 121683431. The reversal of 121683427 is 724386121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724386121 = 10799 ⋅67079.

It is a cyclic number.

It is not a de Polignac number, because 121683427 - 2¹⁹ = 121159139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121683392 and 121683401.

It is not an unprimeable number, because it can be changed into a prime (121683437) 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, 31552 + ... + 35197.

It is an arithmetic number, because the mean of its divisors is an integer number (30438000).

Almost surely, 2^121683427 is an apocalyptic number.

121683427 is a deficient number, since it is larger than the sum of its proper divisors (68573).

121683427 is an equidigital number, since it uses as much as digits as its factorization.

121683427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68572.

The product of its digits is 16128, while the sum is 34.

The square root of 121683427 is about 11031.0211222715. The cubic root of 121683427 is about 495.5382058847.

The spelling of 121683427 in words is "one hundred twenty-one million, six hundred eighty-three thousand, four hundred twenty-seven".