11431521271 has 2 divisors, whose sum is σ = 11431521272. Its totient is φ = 11431521270.

The previous prime is 11431521263. The next prime is 11431521301. The reversal of 11431521271 is 17212513411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11431521271 - 2³ = 11431521263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431521971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715760635 + 5715760636.

It is an arithmetic number, because the mean of its divisors is an integer number (5715760636).

Almost surely, 2^11431521271 is an apocalyptic number.

11431521271 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431521271 is an equidigital number, since it uses as much as digits as its factorization.

11431521271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

The spelling of 11431521271 in words is "eleven billion, four hundred thirty-one million, five hundred twenty-one thousand, two hundred seventy-one".