21222021002012 has 24 divisors (see below), whose sum is σ = 37879475975712. Its totient is φ = 10399739105600.

The previous prime is 21222021001967. The next prime is 21222021002033. The reversal of 21222021002012 is 21020012022212.

It is a happy number.

It is a super-3 number, since 3×21222021002012³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52990664 + ... + 53389647.

It is an arithmetic number, because the mean of its divisors is an integer number (1578311498988).

Almost surely, 2^{21222021002012} is an apocalyptic number.

It is an amenable number.

21222021002012 is a deficient number, since it is larger than the sum of its proper divisors (16657454973700).

21222021002012 is a wasteful number, since it uses less digits than its factorization.

21222021002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106381309 (or 106381307 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222021002012 its reverse (21020012022212), we get a palindrome (42242033024224).

The spelling of 21222021002012 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, two thousand, twelve".