1321134421 has 12 divisors (see below), whose sum is σ = 1408584672. Its totient is φ = 1236759128.

The previous prime is 1321134403. The next prime is 1321134473. The reversal of 1321134421 is 1244311231.

It is not a de Polignac number, because 1321134421 - 2²⁹ = 784263509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321134392 and 1321134401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321134721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37806 + ... + 63808.

It is an arithmetic number, because the mean of its divisors is an integer number (117382056).

Almost surely, 2^1321134421 is an apocalyptic number.

It is an amenable number.

1321134421 is a deficient number, since it is larger than the sum of its proper divisors (87450251).

1321134421 is an equidigital number, since it uses as much as digits as its factorization.

1321134421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26120 (or 26073 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1321134421 is about 36347.4128515359. The cubic root of 1321134421 is about 1097.2754669585.

Adding to 1321134421 its reverse (1244311231), we get a palindrome (2565445652).

The spelling of 1321134421 in words is "one billion, three hundred twenty-one million, one hundred thirty-four thousand, four hundred twenty-one".