1321322212 has 48 divisors (see below), whose sum is σ = 2837576448. Its totient is φ = 525450240.

The previous prime is 1321322183. The next prime is 1321322231. The reversal of 1321322212 is 2122231231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321322212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14248 + ... + 53344.

It is an arithmetic number, because the mean of its divisors is an integer number (59116176).

Almost surely, 2^1321322212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321322212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418788224).

1321322212 is an abundant number, since it is smaller than the sum of its proper divisors (1516254236).

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

1321322212 is a wasteful number, since it uses less digits than its factorization.

1321322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39196 (or 39194 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 1321322212 is about 36349.9960385142. The cubic root of 1321322212 is about 1097.3274547783.

Adding to 1321322212 its product of digits (288), we get a square (1321322500 = 36350²).

Adding to 1321322212 its reverse (2122231231), we get a palindrome (3443553443).

The spelling of 1321322212 in words is "one billion, three hundred twenty-one million, three hundred twenty-two thousand, two hundred twelve".