21022211011 has 2 divisors, whose sum is σ = 21022211012. Its totient is φ = 21022211010.

The previous prime is 21022210987. The next prime is 21022211017. The reversal of 21022211011 is 11011222012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022211011 - 2¹³ = 21022202819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022210982 and 21022211000.

It is not a weakly prime, because it can be changed into another prime (21022211017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511105505 + 10511105506.

It is an arithmetic number, because the mean of its divisors is an integer number (10511105506).

Almost surely, 2^21022211011 is an apocalyptic number.

21022211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022211011 is an equidigital number, since it uses as much as digits as its factorization.

21022211011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022211011 its reverse (11011222012), we get a palindrome (32033433023).

The spelling of 21022211011 in words is "twenty-one billion, twenty-two million, two hundred eleven thousand, eleven".