21030221300313 has 4 divisors (see below), whose sum is σ = 28040295067088. Its totient is φ = 14020147533540.

The previous prime is 21030221300311. The next prime is 21030221300329. The reversal of 21030221300313 is 31300312203012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21030221300313 - 2¹ = 21030221300311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21030221300313.

It is not an unprimeable number, because it can be changed into a prime (21030221300311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3505036883383 + ... + 3505036883388.

It is an arithmetic number, because the mean of its divisors is an integer number (7010073766772).

Almost surely, 2^{21030221300313} is an apocalyptic number.

It is an amenable number.

21030221300313 is a deficient number, since it is larger than the sum of its proper divisors (7010073766775).

21030221300313 is an equidigital number, since it uses as much as digits as its factorization.

21030221300313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7010073766774.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21030221300313 its reverse (31300312203012), we get a palindrome (52330533503325).

The spelling of 21030221300313 in words is "twenty-one trillion, thirty billion, two hundred twenty-one million, three hundred thousand, three hundred thirteen".