20212000112009 has 2 divisors, whose sum is σ = 20212000112010. Its totient is φ = 20212000112008.

The previous prime is 20212000111993. The next prime is 20212000112011. The reversal of 20212000112009 is 90021100021202.

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., 11760420846409 + 8451579265600 = 3429347^2 + 2907160^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212000112009 - 2⁴ = 20212000111993 is a prime.

Together with 20212000112011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20212000112209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106000056004 + 10106000056005.

It is an arithmetic number, because the mean of its divisors is an integer number (10106000056005).

Almost surely, 2^{20212000112009} is an apocalyptic number.

It is an amenable number.

20212000112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212000112009 is an equidigital number, since it uses as much as digits as its factorization.

20212000112009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20212000112009 in words is "twenty trillion, two hundred twelve billion, one hundred twelve thousand, nine".