21022210202011 has 2 divisors, whose sum is σ = 21022210202012. Its totient is φ = 21022210202010.

The previous prime is 21022210201961. The next prime is 21022210202033. The reversal of 21022210202011 is 11020201222012.

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-21022210202011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022210202051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511105101005 + 10511105101006.

It is an arithmetic number, because the mean of its divisors is an integer number (10511105101006).

Almost surely, 2^{21022210202011} is an apocalyptic number.

21022210202011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022210202011 is an equidigital number, since it uses as much as digits as its factorization.

21022210202011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022210202011 its reverse (11020201222012), we get a palindrome (32042411424023).

The spelling of 21022210202011 in words is "twenty-one trillion, twenty-two billion, two hundred ten million, two hundred two thousand, eleven".