21000210022 has 16 divisors (see below), whose sum is σ = 34413735744. Its totient is φ = 9531729000.

The previous prime is 21000210019. The next prime is 21000210029. The reversal of 21000210022 is 22001200012.

It is a junction number, because it is equal to n+sod(n) for n = 21000209990 and 21000210008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000210029) by changing a digit.

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, 675504 + ... + 705907.

It is an arithmetic number, because the mean of its divisors is an integer number (2150858484).

Almost surely, 2^21000210022 is an apocalyptic number.

21000210022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21000210022 is a deficient number, since it is larger than the sum of its proper divisors (13413525722).

21000210022 is a wasteful number, since it uses less digits than its factorization.

21000210022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382115.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21000210022 its reverse (22001200012), we get a palindrome (43001410034).

The spelling of 21000210022 in words is "twenty-one billion, two hundred ten thousand, twenty-two".