201001001801 has 2 divisors, whose sum is σ = 201001001802. Its totient is φ = 201001001800.

The previous prime is 201001001777. The next prime is 201001001807. The reversal of 201001001801 is 108100100102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107318484025 + 93682517776 = 327595^2 + 306076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201001001801 is a prime.

It is a super-3 number, since 3×201001001801³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (201001001807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500500900 + 100500500901.

It is an arithmetic number, because the mean of its divisors is an integer number (100500500901).

Almost surely, 2^201001001801 is an apocalyptic number.

It is an amenable number.

201001001801 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001001801 is an equidigital number, since it uses as much as digits as its factorization.

201001001801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201001001801 its reverse (108100100102), we get a palindrome (309101101903).

The spelling of 201001001801 in words is "two hundred one billion, one million, one thousand, eight hundred one".