1100202001081 has 2 divisors, whose sum is σ = 1100202001082. Its totient is φ = 1100202001080.

The previous prime is 1100202001069. The next prime is 1100202001127. The reversal of 1100202001081 is 1801002020011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672701793856 + 427500207225 = 820184^2 + 653835^2 .

It is an emirp because it is prime and its reverse (1801002020011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1100202001081 - 2⁵ = 1100202001049 is a prime.

It is a super-2 number, since 2×1100202001081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1100202001051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550101000540 + 550101000541.

It is an arithmetic number, because the mean of its divisors is an integer number (550101000541).

Almost surely, 2^{1100202001081} is an apocalyptic number.

It is an amenable number.

1100202001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100202001081 is an equidigital number, since it uses as much as digits as its factorization.

1100202001081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1100202001081 its reverse (1801002020011), we get a palindrome (2901204021092).

The spelling of 1100202001081 in words is "one trillion, one hundred billion, two hundred two million, one thousand, eighty-one".