20012021212 has 12 divisors (see below), whose sum is σ = 35028677656. Its totient is φ = 10003827600.

The previous prime is 20012021203. The next prime is 20012021233. The reversal of 20012021212 is 21212021002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20012021192 and 20012021201.

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 3 ways as a sum of consecutive naturals, for example, 525039 + ... + 561862.

Almost surely, 2^20012021212 is an apocalyptic number.

It is an amenable number.

20012021212 is a deficient number, since it is larger than the sum of its proper divisors (15016656444).

20012021212 is a wasteful number, since it uses less digits than its factorization.

20012021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091508 (or 1091506 counting only the distinct ones).

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

Adding to 20012021212 its reverse (21212021002), we get a palindrome (41224042214).

The spelling of 20012021212 in words is "twenty billion, twelve million, twenty-one thousand, two hundred twelve".