12013321000 has 32 divisors (see below), whose sum is σ = 28111173480. Its totient is φ = 4805328000.

The previous prime is 12013320941. The next prime is 12013321009. The reversal of 12013321000 is 12331021.

It can be written as a sum of positive squares in 4 ways, for example, as 1316383524 + 10696937476 = 36282^2 + 103426^2 .

It is not an unprimeable number, because it can be changed into a prime (12013321009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6005661 + ... + 6007660.

Almost surely, 2^12013321000 is an apocalyptic number.

12013321000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12013321000 is an abundant number, since it is smaller than the sum of its proper divisors (16097852480).

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

12013321000 is a wasteful number, since it uses less digits than its factorization.

12013321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12013342 (or 12013328 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 12013321000 its reverse (12331021), we get a palindrome (12025652021).

The spelling of 12013321000 in words is "twelve billion, thirteen million, three hundred twenty-one thousand".