21010301201213 has 4 divisors (see below), whose sum is σ = 21354732368508. Its totient is φ = 20665870033920.

The previous prime is 21010301201209. The next prime is 21010301201221. The reversal of 21010301201213 is 31210210301012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2869968033604 + 18140333167609 = 1694098^2 + 4259147^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010301201213 - 2² = 21010301201209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010301201191 and 21010301201200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010301201273) 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, 172215583556 + ... + 172215583677.

It is an arithmetic number, because the mean of its divisors is an integer number (5338683092127).

Almost surely, 2^{21010301201213} is an apocalyptic number.

It is an amenable number.

21010301201213 is a deficient number, since it is larger than the sum of its proper divisors (344431167295).

21010301201213 is an equidigital number, since it uses as much as digits as its factorization.

21010301201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344431167294.

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

Adding to 21010301201213 its reverse (31210210301012), we get a palindrome (52220511502225).

The spelling of 21010301201213 in words is "twenty-one trillion, ten billion, three hundred one million, two hundred one thousand, two hundred thirteen".