21001210313 has 8 divisors (see below), whose sum is σ = 21235124736. Its totient is φ = 20768544000.

The previous prime is 21001210309. The next prime is 21001210327. The reversal of 21001210313 is 31301210012.

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 21001210313 - 2² = 21001210309 is a prime.

It is a super-2 number, since 2×21001210313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21001212313) 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, 278168 + ... + 345513.

It is an arithmetic number, because the mean of its divisors is an integer number (2654390592).

Almost surely, 2^21001210313 is an apocalyptic number.

It is an amenable number.

21001210313 is a deficient number, since it is larger than the sum of its proper divisors (233914423).

21001210313 is a wasteful number, since it uses less digits than its factorization.

21001210313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624055.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21001210313 its reverse (31301210012), we get a palindrome (52302420325).

The spelling of 21001210313 in words is "twenty-one billion, one million, two hundred ten thousand, three hundred thirteen".