21022110001 has 2 divisors, whose sum is σ = 21022110002. Its totient is φ = 21022110000.

The previous prime is 21022109989. The next prime is 21022110049. The reversal of 21022110001 is 10001122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21013401600 + 8708401 = 144960^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022110001 - 2¹⁹ = 21021585713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21022110001.

It is not a weakly prime, because it can be changed into another prime (21022110071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511055000 + 10511055001.

It is an arithmetic number, because the mean of its divisors is an integer number (10511055001).

Almost surely, 2^21022110001 is an apocalyptic number.

It is an amenable number.

21022110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022110001 is an equidigital number, since it uses as much as digits as its factorization.

21022110001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21022110001 its reverse (10001122012), we get a palindrome (31023232013).

The spelling of 21022110001 in words is "twenty-one billion, twenty-two million, one hundred ten thousand, one".