1100202020261 has 2 divisors, whose sum is σ = 1100202020262. Its totient is φ = 1100202020260.

The previous prime is 1100202020257. The next prime is 1100202020279. The reversal of 1100202020261 is 1620202020011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705213652900 + 394988367361 = 839770^2 + 628481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100202020261 - 2² = 1100202020257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100202020201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550101010130 + 550101010131.

It is an arithmetic number, because the mean of its divisors is an integer number (550101010131).

Almost surely, 2^{1100202020261} is an apocalyptic number.

It is an amenable number.

1100202020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100202020261 is an equidigital number, since it uses as much as digits as its factorization.

1100202020261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1100202020261 its reverse (1620202020011), we get a palindrome (2720404040272).

The spelling of 1100202020261 in words is "one trillion, one hundred billion, two hundred two million, twenty thousand, two hundred sixty-one".