2105511000401 has 2 divisors, whose sum is σ = 2105511000402. Its totient is φ = 2105511000400.

The previous prime is 2105511000391. The next prime is 2105511000409. The reversal of 2105511000401 is 1040001155012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1783295830801 + 322215169600 = 1335401^2 + 567640^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105511000401 - 2⁶ = 2105511000337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105511000409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052755500200 + 1052755500201.

It is an arithmetic number, because the mean of its divisors is an integer number (1052755500201).

Almost surely, 2^{2105511000401} is an apocalyptic number.

It is an amenable number.

2105511000401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105511000401 is an equidigital number, since it uses as much as digits as its factorization.

2105511000401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 2105511000401 its reverse (1040001155012), we get a palindrome (3145512155413).

The spelling of 2105511000401 in words is "two trillion, one hundred five billion, five hundred eleven million, four hundred one", and thus it is an aban number.