20041221212 has 12 divisors (see below), whose sum is σ = 36597012816. Its totient is φ = 9584931840.

The previous prime is 20041221209. The next prime is 20041221227. The reversal of 20041221212 is 21212214002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108919589 + ... + 108919772.

It is an arithmetic number, because the mean of its divisors is an integer number (3049751068).

Almost surely, 2^20041221212 is an apocalyptic number.

It is an amenable number.

20041221212 is a deficient number, since it is larger than the sum of its proper divisors (16555791604).

20041221212 is a wasteful number, since it uses less digits than its factorization.

20041221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217839388 (or 217839386 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20041221212 its reverse (21212214002), we get a palindrome (41253435214).

The spelling of 20041221212 in words is "twenty billion, forty-one million, two hundred twenty-one thousand, two hundred twelve".