20213220212 has 6 divisors (see below), whose sum is σ = 35373135378. Its totient is φ = 10106610104.

The previous prime is 20213220199. The next prime is 20213220217. The reversal of 20213220212 is 21202231202.

It can be written as a sum of positive squares in only one way, i.e., 12931328656 + 7281891556 = 113716^2 + 85334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213220217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2526652523 + ... + 2526652530.

It is an arithmetic number, because the mean of its divisors is an integer number (5895522563).

Almost surely, 2^20213220212 is an apocalyptic number.

It is an amenable number.

20213220212 is a deficient number, since it is larger than the sum of its proper divisors (15159915166).

20213220212 is a wasteful number, since it uses less digits than its factorization.

20213220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053305057 (or 5053305055 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20213220212 its reverse (21202231202), we get a palindrome (41415451414).

The spelling of 20213220212 in words is "twenty billion, two hundred thirteen million, two hundred twenty thousand, two hundred twelve".