21022210012 has 6 divisors (see below), whose sum is σ = 36788867528. Its totient is φ = 10511105004.

The previous prime is 21022210007. The next prime is 21022210021. The reversal of 21022210012 is 21001222012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21022209974 and 21022210001.

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 as a sum of consecutive naturals, namely, 2627776248 + ... + 2627776255.

Almost surely, 2^21022210012 is an apocalyptic number.

It is an amenable number.

21022210012 is a deficient number, since it is larger than the sum of its proper divisors (15766657516).

21022210012 is a wasteful number, since it uses less digits than its factorization.

21022210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255552507 (or 5255552505 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21022210012 its reverse (21001222012), we get a palindrome (42023432024).

The spelling of 21022210012 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, twelve".