20021212000001 has 2 divisors, whose sum is σ = 20021212000002. Its totient is φ = 20021212000000.

The previous prime is 20021211999961. The next prime is 20021212000037. The reversal of 20021212000001 is 10000021212002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19538159199601 + 483052800400 = 4420199^2 + 695020^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021212000001 - 2³⁰ = 20020138258177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20021212000081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010606000000 + 10010606000001.

It is an arithmetic number, because the mean of its divisors is an integer number (10010606000001).

Almost surely, 2^{20021212000001} is an apocalyptic number.

It is an amenable number.

20021212000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021212000001 is an equidigital number, since it uses as much as digits as its factorization.

20021212000001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021212000001 its reverse (10000021212002), we get a palindrome (30021233212003).

The spelling of 20021212000001 in words is "twenty trillion, twenty-one billion, two hundred twelve million, one", and thus it is an aban number.