1224121427 has 2 divisors, whose sum is σ = 1224121428. Its totient is φ = 1224121426.

The previous prime is 1224121411. The next prime is 1224121469. The reversal of 1224121427 is 7241214221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1224121427 - 2⁴ = 1224121411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1224121396 and 1224121405.

It is not a weakly prime, because it can be changed into another prime (1224123427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612060713 + 612060714.

It is an arithmetic number, because the mean of its divisors is an integer number (612060714).

Almost surely, 2^1224121427 is an apocalyptic number.

1224121427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224121427 is an equidigital number, since it uses as much as digits as its factorization.

1224121427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 26.

The square root of 1224121427 is about 34987.4467059258. The cubic root of 1224121427 is about 1069.7316201736.

Adding to 1224121427 its reverse (7241214221), we get a palindrome (8465335648).

The spelling of 1224121427 in words is "one billion, two hundred twenty-four million, one hundred twenty-one thousand, four hundred twenty-seven".