1221004342 has 8 divisors (see below), whose sum is σ = 1894662000. Its totient is φ = 589450344.

The previous prime is 1221004303. The next prime is 1221004361. The reversal of 1221004342 is 2434001221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10525842 + ... + 10525957.

It is an arithmetic number, because the mean of its divisors is an integer number (236832750).

Almost surely, 2^1221004342 is an apocalyptic number.

1221004342 is a deficient number, since it is larger than the sum of its proper divisors (673657658).

1221004342 is a wasteful number, since it uses less digits than its factorization.

1221004342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21051830.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1221004342 is about 34942.8725493483. The cubic root of 1221004342 is about 1068.8228653762.

Adding to 1221004342 its reverse (2434001221), we get a palindrome (3655005563).

The spelling of 1221004342 in words is "one billion, two hundred twenty-one million, four thousand, three hundred forty-two".