21221233020212 has 12 divisors (see below), whose sum is σ = 37137215162880. Its totient is φ = 10610600116536.

The previous prime is 21221233020103. The next prime is 21221233020233. The reversal of 21221233020212 is 21202033212212.

It is a happy number.

It is a super-2 number, since 2×21221233020212² (a number of 27 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, 910238 + ... + 6578069.

It is an arithmetic number, because the mean of its divisors is an integer number (3094767930240).

Almost surely, 2^{21221233020212} is an apocalyptic number.

It is an amenable number.

21221233020212 is a deficient number, since it is larger than the sum of its proper divisors (15915982142668).

21221233020212 is a wasteful number, since it uses less digits than its factorization.

21221233020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196790 (or 8196788 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21221233020212 its reverse (21202033212212), we get a palindrome (42423266232424).

The spelling of 21221233020212 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred thirty-three million, twenty thousand, two hundred twelve".