20213120212 has 24 divisors (see below), whose sum is σ = 36248591232. Its totient is φ = 9856555200.

The previous prime is 20213120177. The next prime is 20213120233. The reversal of 20213120212 is 21202131202.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 475387 + ... + 516157.

It is an arithmetic number, because the mean of its divisors is an integer number (1510357968).

Almost surely, 2^20213120212 is an apocalyptic number.

It is an amenable number.

20213120212 is a deficient number, since it is larger than the sum of its proper divisors (16035471020).

20213120212 is a wasteful number, since it uses less digits than its factorization.

20213120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43839 (or 43837 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20213120212 its reverse (21202131202), we get a palindrome (41415251414).

The spelling of 20213120212 in words is "twenty billion, two hundred thirteen million, one hundred twenty thousand, two hundred twelve".