1321122132 has 36 divisors (see below), whose sum is σ = 3643095456. Its totient is φ = 400339920.

The previous prime is 1321122109. The next prime is 1321122151. The reversal of 1321122132 is 2312211231.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1667688 + ... + 1668479.

It is an arithmetic number, because the mean of its divisors is an integer number (101197096).

Almost surely, 2^1321122132 is an apocalyptic number.

1321122132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321122132 is an abundant number, since it is smaller than the sum of its proper divisors (2321973324).

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

1321122132 is a wasteful number, since it uses less digits than its factorization.

1321122132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336188 (or 3336183 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1321122132 is about 36347.2438019721. The cubic root of 1321122132 is about 1097.2720647158.

Adding to 1321122132 its reverse (2312211231), we get a palindrome (3633333363).

The spelling of 1321122132 in words is "one billion, three hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-two".