11891225471 has 2 divisors, whose sum is σ = 11891225472. Its totient is φ = 11891225470.

The previous prime is 11891225443. The next prime is 11891225497. The reversal of 11891225471 is 17452219811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11891225471 - 2⁶ = 11891225407 is a prime.

It is a super-3 number, since 3×11891225471³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891825471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945612735 + 5945612736.

It is an arithmetic number, because the mean of its divisors is an integer number (5945612736).

Almost surely, 2^11891225471 is an apocalyptic number.

11891225471 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891225471 is an equidigital number, since it uses as much as digits as its factorization.

11891225471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 41.

The spelling of 11891225471 in words is "eleven billion, eight hundred ninety-one million, two hundred twenty-five thousand, four hundred seventy-one".