20012121212 has 12 divisors (see below), whose sum is σ = 35096855136. Its totient is φ = 9984448320.

The previous prime is 20012121209. The next prime is 20012121223. The reversal of 20012121212 is 21212121002.

20012121212 is a modest number, since divided by 121212 gives 20012 as remainder.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5400989 + ... + 5404692.

It is an arithmetic number, because the mean of its divisors is an integer number (2924737928).

Almost surely, 2^20012121212 is an apocalyptic number.

It is an amenable number.

20012121212 is a deficient number, since it is larger than the sum of its proper divisors (15084733924).

20012121212 is a wasteful number, since it uses less digits than its factorization.

20012121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806148 (or 10806146 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012121212 its reverse (21212121002), we get a palindrome (41224242214).

The spelling of 20012121212 in words is "twenty billion, twelve million, one hundred twenty-one thousand, two hundred twelve".