21101220222011 has 2 divisors, whose sum is σ = 21101220222012. Its totient is φ = 21101220222010.

The previous prime is 21101220221989. The next prime is 21101220222023. The reversal of 21101220222011 is 11022202210112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101220222011 - 2⁶ = 21101220221947 is a prime.

It is a super-2 number, since 2×21101220222011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21101220222211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550610111005 + 10550610111006.

It is an arithmetic number, because the mean of its divisors is an integer number (10550610111006).

Almost surely, 2^{21101220222011} is an apocalyptic number.

21101220222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101220222011 is an equidigital number, since it uses as much as digits as its factorization.

21101220222011 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 21101220222011 its reverse (11022202210112), we get a palindrome (32123422432123).

The spelling of 21101220222011 in words is "twenty-one trillion, one hundred one billion, two hundred twenty million, two hundred twenty-two thousand, eleven".