1233221401 has 4 divisors (see below), whose sum is σ = 1233292032. Its totient is φ = 1233150772.

The previous prime is 1233221399. The next prime is 1233221417. The reversal of 1233221401 is 1041223321.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1041223321 = 191 ⋅5451431.

It is a cyclic number.

It is not a de Polignac number, because 1233221401 - 2¹ = 1233221399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1233221501) 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, 12060 + ... + 51106.

It is an arithmetic number, because the mean of its divisors is an integer number (308323008).

Almost surely, 2^1233221401 is an apocalyptic number.

It is an amenable number.

1233221401 is a deficient number, since it is larger than the sum of its proper divisors (70631).

1233221401 is an equidigital number, since it uses as much as digits as its factorization.

1233221401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70630.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1233221401 is about 35117.2521846457. The cubic root of 1233221401 is about 1072.3758315144.

Adding to 1233221401 its reverse (1041223321), we get a palindrome (2274444722).

It can be divided in two parts, 12332 and 21401, that added together give a palindrome (33733).

The spelling of 1233221401 in words is "one billion, two hundred thirty-three million, two hundred twenty-one thousand, four hundred one".