20021212012 has 12 divisors (see below), whose sum is σ = 35047575360. Its totient is φ = 10007619056.

The previous prime is 20021212007. The next prime is 20021212031. The reversal of 20021212012 is 21021212002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021211983 and 20021212001.

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 3 ways as a sum of consecutive naturals, for example, 731623 + ... + 758494.

It is an arithmetic number, because the mean of its divisors is an integer number (2920631280).

Almost surely, 2^20021212012 is an apocalyptic number.

It is an amenable number.

20021212012 is a deficient number, since it is larger than the sum of its proper divisors (15026363348).

20021212012 is a wasteful number, since it uses less digits than its factorization.

20021212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493480 (or 1493478 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021212012 its reverse (21021212002), we get a palindrome (41042424014).

The spelling of 20021212012 in words is "twenty billion, twenty-one million, two hundred twelve thousand, twelve".