21001331303011 has 2 divisors, whose sum is σ = 21001331303012. Its totient is φ = 21001331303010.

The previous prime is 21001331302933. The next prime is 21001331303021. The reversal of 21001331303011 is 11030313310012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001331303011 - 2¹⁹ = 21001330778723 is a prime.

It is a super-2 number, since 2×21001331303011² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21001331303011.

It is not a weakly prime, because it can be changed into another prime (21001331303021) 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, 10500665651505 + 10500665651506.

It is an arithmetic number, because the mean of its divisors is an integer number (10500665651506).

Almost surely, 2^{21001331303011} is an apocalyptic number.

21001331303011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001331303011 is an equidigital number, since it uses as much as digits as its factorization.

21001331303011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21001331303011 its reverse (11030313310012), we get a palindrome (32031644613023).

The spelling of 21001331303011 in words is "twenty-one trillion, one billion, three hundred thirty-one million, three hundred three thousand, eleven".