21122020220011 has 2 divisors, whose sum is σ = 21122020220012. Its totient is φ = 21122020220010.

The previous prime is 21122020219973. The next prime is 21122020220023. The reversal of 21122020220011 is 11002202022112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122020220011 - 2⁹ = 21122020219499 is a prime.

It is a super-2 number, since 2×21122020220011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21122020220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561010110005 + 10561010110006.

It is an arithmetic number, because the mean of its divisors is an integer number (10561010110006).

Almost surely, 2^{21122020220011} is an apocalyptic number.

21122020220011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122020220011 is an equidigital number, since it uses as much as digits as its factorization.

21122020220011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21122020220011 its reverse (11002202022112), we get a palindrome (32124222242123).

The spelling of 21122020220011 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, two hundred twenty thousand, eleven".