21333310001 has 2 divisors, whose sum is σ = 21333310002. Its totient is φ = 21333310000.

The previous prime is 21333309997. The next prime is 21333310073. The reversal of 21333310001 is 10001333312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13751080225 + 7582229776 = 117265^2 + 87076^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333310001 - 2² = 21333309997 is a prime.

It is a super-2 number, since 2×21333310001² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21333310501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666655000 + 10666655001.

It is an arithmetic number, because the mean of its divisors is an integer number (10666655001).

Almost surely, 2^21333310001 is an apocalyptic number.

It is an amenable number.

21333310001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333310001 is an equidigital number, since it uses as much as digits as its factorization.

21333310001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21333310001 its reverse (10001333312), we get a palindrome (31334643313).

The spelling of 21333310001 in words is "twenty-one billion, three hundred thirty-three million, three hundred ten thousand, one".