1221182342 has 8 divisors (see below), whose sum is σ = 1839988416. Its totient is φ = 607852872.

The previous prime is 1221182311. The next prime is 1221182357. The reversal of 1221182342 is 2432811221.

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, 1368593 + ... + 1369484.

It is an arithmetic number, because the mean of its divisors is an integer number (229998552).

Almost surely, 2^1221182342 is an apocalyptic number.

1221182342 is a deficient number, since it is larger than the sum of its proper divisors (618806074).

1221182342 is a wasteful number, since it uses less digits than its factorization.

1221182342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738302.

The product of its digits is 1536, while the sum is 26.

The square root of 1221182342 is about 34945.4194709407. The cubic root of 1221182342 is about 1068.8748010981.

Adding to 1221182342 its reverse (2432811221), we get a palindrome (3653993563).

The spelling of 1221182342 in words is "one billion, two hundred twenty-one million, one hundred eighty-two thousand, three hundred forty-two".