1310213221 has 8 divisors (see below), whose sum is σ = 1315267200. Its totient is φ = 1305167760.

The previous prime is 1310213209. The next prime is 1310213257. The reversal of 1310213221 is 1223120131.

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 1310213221 - 2¹¹ = 1310211173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310213195 and 1310213204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310213291) 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, 558511 + ... + 560851.

It is an arithmetic number, because the mean of its divisors is an integer number (164408400).

Almost surely, 2^1310213221 is an apocalyptic number.

It is an amenable number.

1310213221 is a deficient number, since it is larger than the sum of its proper divisors (5053979).

1310213221 is a wasteful number, since it uses less digits than its factorization.

1310213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259.

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

The square root of 1310213221 is about 36196.8675578426. The cubic root of 1310213221 is about 1094.2435427856.

Adding to 1310213221 its reverse (1223120131), we get a palindrome (2533333352).

The spelling of 1310213221 in words is "one billion, three hundred ten million, two hundred thirteen thousand, two hundred twenty-one".