1183015271261 has 2 divisors, whose sum is σ = 1183015271262. Its totient is φ = 1183015271260.

The previous prime is 1183015271227. The next prime is 1183015271281. The reversal of 1183015271261 is 1621725103811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 920122192900 + 262893078361 = 959230^2 + 512731^2 .

It is an emirp because it is prime and its reverse (1621725103811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1183015271261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1183015271281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591507635630 + 591507635631.

It is an arithmetic number, because the mean of its divisors is an integer number (591507635631).

Almost surely, 2^{1183015271261} is an apocalyptic number.

It is an amenable number.

1183015271261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183015271261 is an equidigital number, since it uses as much as digits as its factorization.

1183015271261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 1183015271261 in words is "one trillion, one hundred eighty-three billion, fifteen million, two hundred seventy-one thousand, two hundred sixty-one".