21101011022 has 24 divisors (see below), whose sum is σ = 39651352776. Its totient is φ = 8347652208.

The previous prime is 21101010977. The next prime is 21101011033. The reversal of 21101011022 is 22011010112.

It is a junction number, because it is equal to n+sod(n) for n = 21101010994 and 21101011012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8280128 + ... + 8282675.

It is an arithmetic number, because the mean of its divisors is an integer number (1652139699).

Almost surely, 2^21101011022 is an apocalyptic number.

21101011022 is a deficient number, since it is larger than the sum of its proper divisors (18550341754).

21101011022 is a wasteful number, since it uses less digits than its factorization.

21101011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16562832 (or 16562825 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101011022 its reverse (22011010112), we get a palindrome (43112021134).

The spelling of 21101011022 in words is "twenty-one billion, one hundred one million, eleven thousand, twenty-two".