21231022020011 has 2 divisors, whose sum is σ = 21231022020012. Its totient is φ = 21231022020010.

The previous prime is 21231022019989. The next prime is 21231022020031. The reversal of 21231022020011 is 11002022013212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21231022020011 - 2²⁶ = 21230954911147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21231022020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615511010005 + 10615511010006.

It is an arithmetic number, because the mean of its divisors is an integer number (10615511010006).

Almost surely, 2^{21231022020011} is an apocalyptic number.

21231022020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21231022020011 is an equidigital number, since it uses as much as digits as its factorization.

21231022020011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21231022020011 its reverse (11002022013212), we get a palindrome (32233044033223).

The spelling of 21231022020011 in words is "twenty-one trillion, two hundred thirty-one billion, twenty-two million, twenty thousand, eleven".