11571996229 has 2 divisors, whose sum is σ = 11571996230. Its totient is φ = 11571996228.

The previous prime is 11571996217. The next prime is 11571996257. The reversal of 11571996229 is 92269917511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9254055204 + 2317941025 = 96198^2 + 48145^2 .

It is a cyclic number.

It is not a de Polignac number, because 11571996229 - 2²⁷ = 11437778501 is a prime.

It is a super-2 number, since 2×11571996229² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11571996829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5785998114 + 5785998115.

It is an arithmetic number, because the mean of its divisors is an integer number (5785998115).

Almost surely, 2^11571996229 is an apocalyptic number.

It is an amenable number.

11571996229 is a deficient number, since it is larger than the sum of its proper divisors (1).

11571996229 is an equidigital number, since it uses as much as digits as its factorization.

11571996229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 52.

The spelling of 11571996229 in words is "eleven billion, five hundred seventy-one million, nine hundred ninety-six thousand, two hundred twenty-nine".