1100032111261 has 2 divisors, whose sum is σ = 1100032111262. Its totient is φ = 1100032111260.

The previous prime is 1100032111133. The next prime is 1100032111279. The reversal of 1100032111261 is 1621112300011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841898002500 + 258134108761 = 917550^2 + 508069^2 .

It is an emirp because it is prime and its reverse (1621112300011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1100032111261 - 2⁷ = 1100032111133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100032111561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550016055630 + 550016055631.

It is an arithmetic number, because the mean of its divisors is an integer number (550016055631).

Almost surely, 2^{1100032111261} is an apocalyptic number.

It is an amenable number.

1100032111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100032111261 is an equidigital number, since it uses as much as digits as its factorization.

1100032111261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1100032111261 its reverse (1621112300011), we get a palindrome (2721144411272).

The spelling of 1100032111261 in words is "one trillion, one hundred billion, thirty-two million, one hundred eleven thousand, two hundred sixty-one".