21302210031101 has 2 divisors, whose sum is σ = 21302210031102. Its totient is φ = 21302210031100.

The previous prime is 21302210031029. The next prime is 21302210031103. The reversal of 21302210031101 is 10113001220312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10696994431876 + 10605215599225 = 3270626^2 + 3256565^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302210031101 - 2²² = 21302205836797 is a prime.

Together with 21302210031103, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21302210031101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302210031103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651105015550 + 10651105015551.

It is an arithmetic number, because the mean of its divisors is an integer number (10651105015551).

Almost surely, 2^{21302210031101} is an apocalyptic number.

It is an amenable number.

21302210031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302210031101 is an equidigital number, since it uses as much as digits as its factorization.

21302210031101 is an evil number, because the sum of its binary digits is even.

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

Adding to 21302210031101 its reverse (10113001220312), we get a palindrome (31415211251413).

The spelling of 21302210031101 in words is "twenty-one trillion, three hundred two billion, two hundred ten million, thirty-one thousand, one hundred one".