1221341342 has 32 divisors (see below), whose sum is σ = 2019935232. Its totient is φ = 550328544.

The previous prime is 1221341327. The next prime is 1221341411. The reversal of 1221341342 is 2431431221.

It is a super-3 number, since 3×1221341342³ (a number of 28 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 613673 + ... + 615659.

It is an arithmetic number, because the mean of its divisors is an integer number (63122976).

Almost surely, 2^1221341342 is an apocalyptic number.

1221341342 is a deficient number, since it is larger than the sum of its proper divisors (798593890).

1221341342 is a wasteful number, since it uses less digits than its factorization.

1221341342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552.

The product of its digits is 1152, while the sum is 23.

The square root of 1221341342 is about 34947.6943731629. The cubic root of 1221341342 is about 1068.9211888520.

Adding to 1221341342 its reverse (2431431221), we get a palindrome (3652772563).

The spelling of 1221341342 in words is "one billion, two hundred twenty-one million, three hundred forty-one thousand, three hundred forty-two".