1321003212 has 24 divisors (see below), whose sum is σ = 3087022512. Its totient is φ = 439665600.

The previous prime is 1321003171. The next prime is 1321003219. The reversal of 1321003212 is 2123001231.

It is a super-2 number, since 2×1321003212² = 3490098972228633888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321003191 and 1321003200.

It is not an unprimeable number, because it can be changed into a prime (1321003219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75339 + ... + 91202.

It is an arithmetic number, because the mean of its divisors is an integer number (128625938).

Almost surely, 2^1321003212 is an apocalyptic number.

1321003212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321003212 is an abundant number, since it is smaller than the sum of its proper divisors (1766019300).

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

1321003212 is a wasteful number, since it uses less digits than its factorization.

1321003212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167209 (or 167207 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321003212 is about 36345.6078777065. The cubic root of 1321003212 is about 1097.2391403035.

Adding to 1321003212 its reverse (2123001231), we get a palindrome (3444004443).

The spelling of 1321003212 in words is "one billion, three hundred twenty-one million, three thousand, two hundred twelve".