21022212021011 has 2 divisors, whose sum is σ = 21022212021012. Its totient is φ = 21022212021010.

The previous prime is 21022212020911. The next prime is 21022212021067. The reversal of 21022212021011 is 11012021222012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022212021011 - 2¹⁰ = 21022212019987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022212021611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511106010505 + 10511106010506.

It is an arithmetic number, because the mean of its divisors is an integer number (10511106010506).

Almost surely, 2^{21022212021011} is an apocalyptic number.

21022212021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022212021011 is an equidigital number, since it uses as much as digits as its factorization.

21022212021011 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 17.

Adding to 21022212021011 its reverse (11012021222012), we get a palindrome (32034233243023).

The spelling of 21022212021011 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, twenty-one thousand, eleven".