21000100022 has 8 divisors (see below), whose sum is σ = 34363800072. Its totient is φ = 9545500000.

The previous prime is 21000100003. The next prime is 21000100031. The reversal of 21000100022 is 22000100012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21000099982 and 21000100009.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 477274979 + ... + 477275022.

It is an arithmetic number, because the mean of its divisors is an integer number (4295475009).

Almost surely, 2^21000100022 is an apocalyptic number.

21000100022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21000100022 is a deficient number, since it is larger than the sum of its proper divisors (13363700050).

21000100022 is a wasteful number, since it uses less digits than its factorization.

21000100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954550014.

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

Adding to 21000100022 its reverse (22000100012), we get a palindrome (43000200034).

The spelling of 21000100022 in words is "twenty-one billion, one hundred thousand, twenty-two".