1020001911001 has 2 divisors, whose sum is σ = 1020001911002. Its totient is φ = 1020001911000.

The previous prime is 1020001910971. The next prime is 1020001911007. The reversal of 1020001911001 is 1001191000201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019996982601 + 4928400 = 1009949^2 + 2220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020001911001 - 2¹¹ = 1020001908953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020001911007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510000955500 + 510000955501.

It is an arithmetic number, because the mean of its divisors is an integer number (510000955501).

Almost surely, 2^{1020001911001} is an apocalyptic number.

It is an amenable number.

1020001911001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020001911001 is an equidigital number, since it uses as much as digits as its factorization.

1020001911001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1020001911001 its reverse (1001191000201), we get a palindrome (2021192911202).

The spelling of 1020001911001 in words is "one trillion, twenty billion, one million, nine hundred eleven thousand, one".