202001010001001 has 2 divisors, whose sum is σ = 202001010001002. Its totient is φ = 202001010001000.

The previous prime is 202001010000989. The next prime is 202001010001019. The reversal of 202001010001001 is 100100010100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190204120685401 + 11796889315600 = 13791451^2 + 3434660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202001010001001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202001010001001.

It is not a weakly prime, because it can be changed into another prime (202001010001201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101000505000500 + 101000505000501.

It is an arithmetic number, because the mean of its divisors is an integer number (101000505000501).

Almost surely, 2^{202001010001001} is an apocalyptic number.

It is an amenable number.

202001010001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

202001010001001 is an equidigital number, since it uses as much as digits as its factorization.

202001010001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 202001010001001 its reverse (100100010100202), we get a palindrome (302101020101203).

The spelling of 202001010001001 in words is "two hundred two trillion, one billion, ten million, one thousand, one".