221000221020212 has 12 divisors (see below), whose sum is σ = 386790543678336. Its totient is φ = 110488637112120.

The previous prime is 221000221020119. The next prime is 221000221020217. The reversal of 221000221020212 is 212020122000122.

It is a happy number.

It is a super-2 number, since 2×221000221020212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000221020217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2868306158 + ... + 2868383205.

It is an arithmetic number, because the mean of its divisors is an integer number (32232545306528).

Almost surely, 2^{221000221020212} is an apocalyptic number.

It is an amenable number.

221000221020212 is a deficient number, since it is larger than the sum of its proper divisors (165790322658124).

221000221020212 is a wasteful number, since it uses less digits than its factorization.

221000221020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736698998 (or 5736698996 counting only the distinct ones).

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

Adding to 221000221020212 its reverse (212020122000122), we get a palindrome (433020343020334).

The spelling of 221000221020212 in words is "two hundred twenty-one trillion, two hundred twenty-one million, twenty thousand, two hundred twelve".