20120320212 has 12 divisors (see below), whose sum is σ = 46947413856. Its totient is φ = 6706773400.

The previous prime is 20120320211. The next prime is 20120320219. The reversal of 20120320212 is 21202302102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20120320191 and 20120320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120320211) 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, 838346664 + ... + 838346687.

It is an arithmetic number, because the mean of its divisors is an integer number (3912284488).

Almost surely, 2^20120320212 is an apocalyptic number.

It is an amenable number.

20120320212 is an abundant number, since it is smaller than the sum of its proper divisors (26827093644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20120320212 is a wasteful number, since it uses less digits than its factorization.

20120320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676693358 (or 1676693356 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20120320212 its reverse (21202302102), we get a palindrome (41322622314).

The spelling of 20120320212 in words is "twenty billion, one hundred twenty million, three hundred twenty thousand, two hundred twelve".