1334121221 has 4 divisors (see below), whose sum is σ = 1347330444. Its totient is φ = 1320912000.

The previous prime is 1334121211. The next prime is 1334121251. The reversal of 1334121221 is 1221214331.

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 820192321 + 513928900 = 28639^2 + 22670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1334121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1334121193 and 1334121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1334121211) by changing a digit.

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, 6604460 + ... + 6604661.

It is an arithmetic number, because the mean of its divisors is an integer number (336832611).

Almost surely, 2^1334121221 is an apocalyptic number.

It is an amenable number.

1334121221 is a deficient number, since it is larger than the sum of its proper divisors (13209223).

1334121221 is a wasteful number, since it uses less digits than its factorization.

1334121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13209222.

The product of its digits is 288, while the sum is 20.

The square root of 1334121221 is about 36525.6241698893. The cubic root of 1334121221 is about 1100.8591692559.

Adding to 1334121221 its reverse (1221214331), we get a palindrome (2555335552).

The spelling of 1334121221 in words is "one billion, three hundred thirty-four million, one hundred twenty-one thousand, two hundred twenty-one".