11101220102261 has 2 divisors, whose sum is σ = 11101220102262. Its totient is φ = 11101220102260.

The previous prime is 11101220102243. The next prime is 11101220102263. The reversal of 11101220102261 is 16220102210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10701076562500 + 400143539761 = 3271250^2 + 632569^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101220102261 - 2²⁶ = 11101152993397 is a prime.

Together with 11101220102263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101220102263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550610051130 + 5550610051131.

It is an arithmetic number, because the mean of its divisors is an integer number (5550610051131).

Almost surely, 2^{11101220102261} is an apocalyptic number.

It is an amenable number.

11101220102261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101220102261 is an equidigital number, since it uses as much as digits as its factorization.

11101220102261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11101220102261 its reverse (16220102210111), we get a palindrome (27321322312372).

The spelling of 11101220102261 in words is "eleven trillion, one hundred one billion, two hundred twenty million, one hundred two thousand, two hundred sixty-one".