21010021220011 has 2 divisors, whose sum is σ = 21010021220012. Its totient is φ = 21010021220010.

The previous prime is 21010021220003. The next prime is 21010021220053. The reversal of 21010021220011 is 11002212001012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010021220011 - 2³ = 21010021220003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010021219973 and 21010021220000.

It is not a weakly prime, because it can be changed into another prime (21010021220611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505010610005 + 10505010610006.

It is an arithmetic number, because the mean of its divisors is an integer number (10505010610006).

Almost surely, 2^{21010021220011} is an apocalyptic number.

21010021220011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010021220011 is an equidigital number, since it uses as much as digits as its factorization.

21010021220011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010021220011 its reverse (11002212001012), we get a palindrome (32012233221023).

The spelling of 21010021220011 in words is "twenty-one trillion, ten billion, twenty-one million, two hundred twenty thousand, eleven".