20122221101212 has 6 divisors (see below), whose sum is σ = 35213886927128. Its totient is φ = 10061110550604.

The previous prime is 20122221101201. The next prime is 20122221101233. The reversal of 20122221101212 is 21210112222102.

It is a super-2 number, since 2×20122221101212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20122221101212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515277637648 + ... + 2515277637655.

Almost surely, 2^{20122221101212} is an apocalyptic number.

It is an amenable number.

20122221101212 is a deficient number, since it is larger than the sum of its proper divisors (15091665825916).

20122221101212 is a wasteful number, since it uses less digits than its factorization.

20122221101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030555275307 (or 5030555275305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20122221101212 its reverse (21210112222102), we get a palindrome (41332333323314).

The spelling of 20122221101212 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred one thousand, two hundred twelve".