21122210012 has 12 divisors (see below), whose sum is σ = 37043706336. Its totient is φ = 10538293920.

The previous prime is 21122209993. The next prime is 21122210027. The reversal of 21122210012 is 21001222112.

It is a super-2 number, since 2×21122210012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5700689 + ... + 5704392.

It is an arithmetic number, because the mean of its divisors is an integer number (3086975528).

Almost surely, 2^21122210012 is an apocalyptic number.

It is an amenable number.

21122210012 is a deficient number, since it is larger than the sum of its proper divisors (15921496324).

21122210012 is a wasteful number, since it uses less digits than its factorization.

21122210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11405548 (or 11405546 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21122210012 its reverse (21001222112), we get a palindrome (42123432124).

It can be divided in two parts, 211222100 and 12, that added together give a palindrome (211222112).

The spelling of 21122210012 in words is "twenty-one billion, one hundred twenty-two million, two hundred ten thousand, twelve".