21023022011 has 2 divisors, whose sum is σ = 21023022012. Its totient is φ = 21023022010.

The previous prime is 21023021989. The next prime is 21023022047. The reversal of 21023022011 is 11022032012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023022011 - 2⁶ = 21023021947 is a prime.

It is not a weakly prime, because it can be changed into another prime (21023022091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511511005 + 10511511006.

It is an arithmetic number, because the mean of its divisors is an integer number (10511511006).

Almost surely, 2^21023022011 is an apocalyptic number.

21023022011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023022011 is an equidigital number, since it uses as much as digits as its factorization.

21023022011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21023022011 its reverse (11022032012), we get a palindrome (32045054023).

The spelling of 21023022011 in words is "twenty-one billion, twenty-three million, twenty-two thousand, eleven".