21022210011 has 16 divisors (see below), whose sum is σ = 30610719360. Its totient is φ = 12727000320.

The previous prime is 21022210007. The next prime is 21022210021. The reversal of 21022210011 is 11001222012.

It is not a de Polignac number, because 21022210011 - 2² = 21022210007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022210021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312205 + ... + 373518.

It is an arithmetic number, because the mean of its divisors is an integer number (1913169960).

Almost surely, 2^21022210011 is an apocalyptic number.

21022210011 is a deficient number, since it is larger than the sum of its proper divisors (9588509349).

21022210011 is a wasteful number, since it uses less digits than its factorization.

21022210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686666.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21022210011 its reverse (11001222012), we get a palindrome (32023432023).

The spelling of 21022210011 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, eleven".