21021010210313 has 4 divisors (see below), whose sum is σ = 21021559286400. Its totient is φ = 21020461134228.

The previous prime is 21021010210237. The next prime is 21021010210339. The reversal of 21021010210313 is 31301201012012.

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 a cyclic number.

It is not a de Polignac number, because 21021010210313 - 2¹⁰ = 21021010209289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021010210291 and 21021010210300.

It is not an unprimeable number, because it can be changed into a prime (21021010210373) 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, 274480613 + ... + 274557186.

It is an arithmetic number, because the mean of its divisors is an integer number (5255389821600).

Almost surely, 2^{21021010210313} is an apocalyptic number.

It is an amenable number.

21021010210313 is a deficient number, since it is larger than the sum of its proper divisors (549076087).

21021010210313 is an equidigital number, since it uses as much as digits as its factorization.

21021010210313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549076086.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21021010210313 its reverse (31301201012012), we get a palindrome (52322211222325).

The spelling of 21021010210313 in words is "twenty-one trillion, twenty-one billion, ten million, two hundred ten thousand, three hundred thirteen".