21000022301 has 2 divisors, whose sum is σ = 21000022302. Its totient is φ = 21000022300.

The previous prime is 21000022297. The next prime is 21000022331. The reversal of 21000022301 is 10322000012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20974570276 + 25452025 = 144826^2 + 5045^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000022301 - 2² = 21000022297 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000022331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011150 + 10500011151.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011151).

Almost surely, 2^21000022301 is an apocalyptic number.

It is an amenable number.

21000022301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000022301 is an equidigital number, since it uses as much as digits as its factorization.

21000022301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21000022301 its reverse (10322000012), we get a palindrome (31322022313).

The spelling of 21000022301 in words is "twenty-one billion, twenty-two thousand, three hundred one".