21011010022 has 32 divisors (see below), whose sum is σ = 33521900544. Its totient is φ = 9842764800.

The previous prime is 21011010011. The next prime is 21011010029. The reversal of 21011010022 is 22001011012.

It is a junction number, because it is equal to n+sod(n) for n = 21011009990 and 21011010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011010029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8606322 + ... + 8608762.

It is an arithmetic number, because the mean of its divisors is an integer number (1047559392).

Almost surely, 2^21011010022 is an apocalyptic number.

21011010022 is a deficient number, since it is larger than the sum of its proper divisors (12510890522).

21011010022 is a wasteful number, since it uses less digits than its factorization.

21011010022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21011010022 its reverse (22001011012), we get a palindrome (43012021034).

The spelling of 21011010022 in words is "twenty-one billion, eleven million, ten thousand, twenty-two".