21202222210012 has 12 divisors (see below), whose sum is σ = 37267342124040. Its totient is φ = 10554410174576.

The previous prime is 21202222209989. The next prime is 21202222210063. The reversal of 21202222210012 is 21001222220212.

It is a super-2 number, since 2×21202222210012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11675231587 + ... + 11675233402.

It is an arithmetic number, because the mean of its divisors is an integer number (3105611843670).

Almost surely, 2^{21202222210012} is an apocalyptic number.

It is an amenable number.

21202222210012 is a deficient number, since it is larger than the sum of its proper divisors (16065119914028).

21202222210012 is a wasteful number, since it uses less digits than its factorization.

21202222210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23350465220 (or 23350465218 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202222210012 its reverse (21001222220212), we get a palindrome (42203444430224).

The spelling of 21202222210012 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, two hundred ten thousand, twelve".