1234404221 has 16 divisors (see below), whose sum is σ = 1362336768. Its totient is φ = 1113350400.

The previous prime is 1234404211. The next prime is 1234404247. The reversal of 1234404221 is 1224044321.

It is not a de Polignac number, because 1234404221 - 2²² = 1230209917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234404211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42911 + ... + 65651.

It is an arithmetic number, because the mean of its divisors is an integer number (85146048).

Almost surely, 2^1234404221 is an apocalyptic number.

It is an amenable number.

1234404221 is a deficient number, since it is larger than the sum of its proper divisors (127932547).

1234404221 is a wasteful number, since it uses less digits than its factorization.

1234404221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22892.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1234404221 is about 35134.0891585366. The cubic root of 1234404221 is about 1072.7185713411.

Adding to 1234404221 its reverse (1224044321), we get a palindrome (2458448542).

The spelling of 1234404221 in words is "one billion, two hundred thirty-four million, four hundred four thousand, two hundred twenty-one".