1224421001 has 4 divisors (see below), whose sum is σ = 1252895952. Its totient is φ = 1195946052.

The previous prime is 1224420961. The next prime is 1224421027. The reversal of 1224421001 is 1001244221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001244221 = 2857 ⋅350453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224421001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224421061) 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, 14237411 + ... + 14237496.

It is an arithmetic number, because the mean of its divisors is an integer number (313223988).

Almost surely, 2^1224421001 is an apocalyptic number.

It is an amenable number.

1224421001 is a deficient number, since it is larger than the sum of its proper divisors (28474951).

1224421001 is an equidigital number, since it uses as much as digits as its factorization.

1224421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28474950.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1224421001 is about 34991.7276081076. The cubic root of 1224421001 is about 1069.8188766704.

Adding to 1224421001 its reverse (1001244221), we get a palindrome (2225665222).

The spelling of 1224421001 in words is "one billion, two hundred twenty-four million, four hundred twenty-one thousand, one".