202001210122009 has 2 divisors, whose sum is σ = 202001210122010. Its totient is φ = 202001210122008.

The previous prime is 202001210121979. The next prime is 202001210122051. The reversal of 202001210122009 is 900221012100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198697075040025 + 3304135081984 = 14095995^2 + 1817728^2 .

It is a cyclic number.

It is not a de Polignac number, because 202001210122009 - 2⁹ = 202001210121497 is a prime.

It is not a weakly prime, because it can be changed into another prime (202001210122079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101000605061004 + 101000605061005.

It is an arithmetic number, because the mean of its divisors is an integer number (101000605061005).

Almost surely, 2^{202001210122009} is an apocalyptic number.

It is an amenable number.

202001210122009 is a deficient number, since it is larger than the sum of its proper divisors (1).

202001210122009 is an equidigital number, since it uses as much as digits as its factorization.

202001210122009 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 202001210122009 in words is "two hundred two trillion, one billion, two hundred ten million, one hundred twenty-two thousand, nine".