21021222102011 has 2 divisors, whose sum is σ = 21021222102012. Its totient is φ = 21021222102010.

The previous prime is 21021222102007. The next prime is 21021222102017. The reversal of 21021222102011 is 11020122212012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021222102011 - 2² = 21021222102007 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21021222102017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510611051005 + 10510611051006.

It is an arithmetic number, because the mean of its divisors is an integer number (10510611051006).

Almost surely, 2^{21021222102011} is an apocalyptic number.

21021222102011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021222102011 is an equidigital number, since it uses as much as digits as its factorization.

21021222102011 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 17.

Adding to 21021222102011 its reverse (11020122212012), we get a palindrome (32041344314023).

The spelling of 21021222102011 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred two thousand, eleven".