1321321134 has 32 divisors (see below), whose sum is σ = 3101792256. Its totient is φ = 367316640.

The previous prime is 1321321129. The next prime is 1321321139. The reversal of 1321321134 is 4311231231.

It is an interprime number because it is at equal distance from previous prime (1321321129) and next prime (1321321139).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321321134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321321139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423582 + ... + 426689.

It is an arithmetic number, because the mean of its divisors is an integer number (96931008).

Almost surely, 2^1321321134 is an apocalyptic number.

1321321134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1321321134 is an abundant number, since it is smaller than the sum of its proper divisors (1780471122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321321134 is a wasteful number, since it uses less digits than its factorization.

1321321134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850320.

The product of its digits is 432, while the sum is 21.

The square root of 1321321134 is about 36349.9812104491. The cubic root of 1321321134 is about 1097.3271563603.

Adding to 1321321134 its reverse (4311231231), we get a palindrome (5632552365).

The spelling of 1321321134 in words is "one billion, three hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty-four".