1321101213 has 8 divisors (see below), whose sum is σ = 1761636576. Its totient is φ = 880650000.

The previous prime is 1321101211. The next prime is 1321101227. The reversal of 1321101213 is 3121011231.

It is a happy number.

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

It is not a de Polignac number, because 1321101213 - 2¹ = 1321101211 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321101192 and 1321101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321101211) 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, 47463 + ... + 69963.

It is an arithmetic number, because the mean of its divisors is an integer number (220204572).

Almost surely, 2^1321101213 is an apocalyptic number.

It is an amenable number.

1321101213 is a deficient number, since it is larger than the sum of its proper divisors (440535363).

1321101213 is a wasteful number, since it uses less digits than its factorization.

1321101213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42075.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1321101213 is about 36346.9560348594. The cubic root of 1321101213 is about 1097.2662731858.

Adding to 1321101213 its reverse (3121011231), we get a palindrome (4442112444).

The spelling of 1321101213 in words is "one billion, three hundred twenty-one million, one hundred one thousand, two hundred thirteen".