11103142261 has 2 divisors, whose sum is σ = 11103142262. Its totient is φ = 11103142260.

The previous prime is 11103142229. The next prime is 11103142321. The reversal of 11103142261 is 16224130111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8261719236 + 2841423025 = 90894^2 + 53305^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103142261 - 2⁵ = 11103142229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11103142861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551571130 + 5551571131.

It is an arithmetic number, because the mean of its divisors is an integer number (5551571131).

Almost surely, 2^11103142261 is an apocalyptic number.

It is an amenable number.

11103142261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103142261 is an equidigital number, since it uses as much as digits as its factorization.

11103142261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11103142261 its reverse (16224130111), we get a palindrome (27327272372).

The spelling of 11103142261 in words is "eleven billion, one hundred three million, one hundred forty-two thousand, two hundred sixty-one".