1321222013000 has 32 divisors (see below), whose sum is σ = 3091659512760. Its totient is φ = 528488804800.

The previous prime is 1321222012933. The next prime is 1321222013009. The reversal of 1321222013000 is 3102221231.

It can be written as a sum of positive squares in 4 ways, for example, as 51782643364 + 1269439369636 = 227558^2 + 1126694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1321222013000.

It is not an unprimeable number, because it can be changed into a prime (1321222013009) 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, 660610007 + ... + 660612006.

Almost surely, 2^{1321222013000} is an apocalyptic number.

1321222013000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321222013000 is an abundant number, since it is smaller than the sum of its proper divisors (1770437499760).

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

1321222013000 is a wasteful number, since it uses less digits than its factorization.

1321222013000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321222034 (or 1321222020 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1321222013000 its reverse (3102221231), we get a palindrome (1324324234231).

The spelling of 1321222013000 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-two million, thirteen thousand".