11111231429 has 2 divisors, whose sum is σ = 11111231430. Its totient is φ = 11111231428.

The previous prime is 11111231401. The next prime is 11111231449. The reversal of 11111231429 is 92413211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10863892900 + 247338529 = 104230^2 + 15727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111231429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111231398 and 11111231407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111231449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555615714 + 5555615715.

It is an arithmetic number, because the mean of its divisors is an integer number (5555615715).

Almost surely, 2^11111231429 is an apocalyptic number.

It is an amenable number.

11111231429 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111231429 is an equidigital number, since it uses as much as digits as its factorization.

11111231429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 26.

The spelling of 11111231429 in words is "eleven billion, one hundred eleven million, two hundred thirty-one thousand, four hundred twenty-nine".