1221342134 has 8 divisors (see below), whose sum is σ = 1895186160. Its totient is φ = 589613416.

The previous prime is 1221342127. The next prime is 1221342167. The reversal of 1221342134 is 4312431221.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10528754 + ... + 10528869.

It is an arithmetic number, because the mean of its divisors is an integer number (236898270).

Almost surely, 2^1221342134 is an apocalyptic number.

1221342134 is a deficient number, since it is larger than the sum of its proper divisors (673844026).

1221342134 is a wasteful number, since it uses less digits than its factorization.

1221342134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21057654.

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

The square root of 1221342134 is about 34947.7057043807. The cubic root of 1221342134 is about 1068.9214199055.

Adding to 1221342134 its reverse (4312431221), we get a palindrome (5533773355).

The spelling of 1221342134 in words is "one billion, two hundred twenty-one million, three hundred forty-two thousand, one hundred thirty-four".