202012202009 has 2 divisors, whose sum is σ = 202012202010. Its totient is φ = 202012202008.

The previous prime is 202012202003. The next prime is 202012202131. The reversal of 202012202009 is 900202210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158642890000 + 43369312009 = 398300^2 + 208253^2 .

It is a cyclic number.

It is not a de Polignac number, because 202012202009 - 2³² = 197717234713 is a prime.

It is not a weakly prime, because it can be changed into another prime (202012202003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006101004 + 101006101005.

It is an arithmetic number, because the mean of its divisors is an integer number (101006101005).

Almost surely, 2^202012202009 is an apocalyptic number.

It is an amenable number.

202012202009 is a deficient number, since it is larger than the sum of its proper divisors (1).

202012202009 is an equidigital number, since it uses as much as digits as its factorization.

202012202009 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 20.

The spelling of 202012202009 in words is "two hundred two billion, twelve million, two hundred two thousand, nine".