1321201213 has 8 divisors (see below), whose sum is σ = 1380456000. Its totient is φ = 1262097408.

The previous prime is 1321201199. The next prime is 1321201229. The reversal of 1321201213 is 3121021231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321201213 - 2⁵ = 1321201181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321201243) 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, 19663 + ... + 55036.

It is an arithmetic number, because the mean of its divisors is an integer number (172557000).

Almost surely, 2^1321201213 is an apocalyptic number.

It is an amenable number.

1321201213 is a deficient number, since it is larger than the sum of its proper divisors (59254787).

1321201213 is an equidigital number, since it uses as much as digits as its factorization.

1321201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75491.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321201213 is about 36348.3316398428. The cubic root of 1321201213 is about 1097.2939581347.

Adding to 1321201213 its reverse (3121021231), we get a palindrome (4442222444).

The spelling of 1321201213 in words is "one billion, three hundred twenty-one million, two hundred one thousand, two hundred thirteen".