1321201313210 has 8 divisors (see below), whose sum is σ = 2378162363796. Its totient is φ = 528480525280.

The previous prime is 1321201313183. The next prime is 1321201313239. The reversal of 1321201313210 is 123131021231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1313134938241 + 8066374969 = 1145921^2 + 89813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66060065651 + ... + 66060065670.

Almost surely, 2^{1321201313210} is an apocalyptic number.

1321201313210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321201313210 is a deficient number, since it is larger than the sum of its proper divisors (1056961050586).

1321201313210 is a wasteful number, since it uses less digits than its factorization.

1321201313210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132120131328.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321201313210 its reverse (123131021231), we get a palindrome (1444332334441).

The spelling of 1321201313210 in words is "one trillion, three hundred twenty-one billion, two hundred one million, three hundred thirteen thousand, two hundred ten".