1221342242 has 8 divisors (see below), whose sum is σ = 1841605632. Its totient is φ = 607473700.

The previous prime is 1221342223. The next prime is 1221342277. The reversal of 1221342242 is 2422431221.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1598234 + ... + 1598997.

It is an arithmetic number, because the mean of its divisors is an integer number (230200704).

Almost surely, 2^1221342242 is an apocalyptic number.

1221342242 is a deficient number, since it is larger than the sum of its proper divisors (620263390).

1221342242 is a wasteful number, since it uses less digits than its factorization.

1221342242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197424.

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

The square root of 1221342242 is about 34947.7072495464. The cubic root of 1221342242 is about 1068.9214514128.

Adding to 1221342242 its reverse (2422431221), we get a palindrome (3643773463).

The spelling of 1221342242 in words is "one billion, two hundred twenty-one million, three hundred forty-two thousand, two hundred forty-two".