2021202112009 has 2 divisors, whose sum is σ = 2021202112010. Its totient is φ = 2021202112008.

The previous prime is 2021202111949. The next prime is 2021202112021. The reversal of 2021202112009 is 9002112021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1472832241609 + 548369870400 = 1213603^2 + 740520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021202112009 - 2¹⁵ = 2021202079241 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021202110009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010601056004 + 1010601056005.

It is an arithmetic number, because the mean of its divisors is an integer number (1010601056005).

Almost surely, 2^{2021202112009} is an apocalyptic number.

It is an amenable number.

2021202112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021202112009 is an equidigital number, since it uses as much as digits as its factorization.

2021202112009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2021202112009 in words is "two trillion, twenty-one billion, two hundred two million, one hundred twelve thousand, nine".