1221234341 has 4 divisors (see below), whose sum is σ = 1263345900. Its totient is φ = 1179122784.

The previous prime is 1221234319. The next prime is 1221234347. The reversal of 1221234341 is 1434321221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 997612225 + 223622116 = 31585^2 + 14954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221234341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221234347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21055736 + ... + 21055793.

It is an arithmetic number, because the mean of its divisors is an integer number (315836475).

Almost surely, 2^1221234341 is an apocalyptic number.

It is an amenable number.

1221234341 is a deficient number, since it is larger than the sum of its proper divisors (42111559).

1221234341 is an equidigital number, since it uses as much as digits as its factorization.

1221234341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42111558.

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

The square root of 1221234341 is about 34946.1634661088. The cubic root of 1221234341 is about 1068.8899720872.

Adding to 1221234341 its reverse (1434321221), we get a palindrome (2655555562).

The spelling of 1221234341 in words is "one billion, two hundred twenty-one million, two hundred thirty-four thousand, three hundred forty-one".