21010440022 has 16 divisors (see below), whose sum is σ = 37025391312. Its totient is φ = 8815569120.

The previous prime is 21010440007. The next prime is 21010440067. The reversal of 21010440022 is 22004401012.

It is a junction number, because it is equal to n+sod(n) for n = 21010439978 and 21010440005.

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 7 ways as a sum of consecutive naturals, for example, 36731253 + ... + 36731824.

It is an arithmetic number, because the mean of its divisors is an integer number (2314086957).

Almost surely, 2^21010440022 is an apocalyptic number.

21010440022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21010440022 is a deficient number, since it is larger than the sum of its proper divisors (16014951290).

21010440022 is a wasteful number, since it uses less digits than its factorization.

21010440022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73463103.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21010440022 its reverse (22004401012), we get a palindrome (43014841034).

The spelling of 21010440022 in words is "twenty-one billion, ten million, four hundred forty thousand, twenty-two".