21022002011 has 2 divisors, whose sum is σ = 21022002012. Its totient is φ = 21022002010.

The previous prime is 21022001977. The next prime is 21022002041. The reversal of 21022002011 is 11020022012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022002011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022001983 and 21022002001.

It is not a weakly prime, because it can be changed into another prime (21022002041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511001005 + 10511001006.

It is an arithmetic number, because the mean of its divisors is an integer number (10511001006).

Almost surely, 2^21022002011 is an apocalyptic number.

21022002011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022002011 is an equidigital number, since it uses as much as digits as its factorization.

21022002011 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 11.

Adding to 21022002011 its reverse (11020022012), we get a palindrome (32042024023).

The spelling of 21022002011 in words is "twenty-one billion, twenty-two million, two thousand, eleven".