21012223301 has 2 divisors, whose sum is σ = 21012223302. Its totient is φ = 21012223300.

The previous prime is 21012223289. The next prime is 21012223303. The reversal of 21012223301 is 10332221012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20998908100 + 13315201 = 144910^2 + 3649^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012223301 - 2³⁴ = 3832354117 is a prime.

Together with 21012223303, 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 21012223301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012223303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506111650 + 10506111651.

It is an arithmetic number, because the mean of its divisors is an integer number (10506111651).

Almost surely, 2^21012223301 is an apocalyptic number.

It is an amenable number.

21012223301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012223301 is an equidigital number, since it uses as much as digits as its factorization.

21012223301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21012223301 its reverse (10332221012), we get a palindrome (31344444313).

The spelling of 21012223301 in words is "twenty-one billion, twelve million, two hundred twenty-three thousand, three hundred one".