121222427 has 4 divisors (see below), whose sum is σ = 128353176. Its totient is φ = 114091680.

The previous prime is 121222421. The next prime is 121222457. The reversal of 121222427 is 724222121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724222121 = 7 ⋅103460303.

It is a cyclic number.

It is not a de Polignac number, because 121222427 - 2¹⁰ = 121221403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222421) 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, 3565349 + ... + 3565382.

It is an arithmetic number, because the mean of its divisors is an integer number (32088294).

Almost surely, 2^121222427 is an apocalyptic number.

121222427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121222427 is a deficient number, since it is larger than the sum of its proper divisors (7130749).

121222427 is an equidigital number, since it uses as much as digits as its factorization.

121222427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7130748.

The product of its digits is 896, while the sum is 23.

The square root of 121222427 is about 11010.1056761504. The cubic root of 121222427 is about 494.9116286142.

Adding to 121222427 its reverse (724222121), we get a palindrome (845444548).

The spelling of 121222427 in words is "one hundred twenty-one million, two hundred twenty-two thousand, four hundred twenty-seven".