20021102220212 has 24 divisors (see below), whose sum is σ = 35090906860800. Its totient is φ = 9995132504736.

The previous prime is 20021102220173. The next prime is 20021102220233. The reversal of 20021102220212 is 21202220112002.

It is a happy number.

It is a super-2 number, since 2×20021102220212² (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 7 ways as a sum of consecutive naturals, for example, 21549593 + ... + 22459455.

It is an arithmetic number, because the mean of its divisors is an integer number (1462121119200).

Almost surely, 2^{20021102220212} is an apocalyptic number.

It is an amenable number.

20021102220212 is a deficient number, since it is larger than the sum of its proper divisors (15069804640588).

20021102220212 is a wasteful number, since it uses less digits than its factorization.

20021102220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918335 (or 918333 counting only the distinct ones).

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

Adding to 20021102220212 its reverse (21202220112002), we get a palindrome (41223322332214).

The spelling of 20021102220212 in words is "twenty trillion, twenty-one billion, one hundred two million, two hundred twenty thousand, two hundred twelve".