111131211229 has 2 divisors, whose sum is σ = 111131211230. Its totient is φ = 111131211228.

The previous prime is 111131211203. The next prime is 111131211293. The reversal of 111131211229 is 922112131111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110507710329 + 623500900 = 332427^2 + 24970^2 .

It is a cyclic number.

It is not a de Polignac number, because 111131211229 - 2¹¹ = 111131209181 is a prime.

It is a super-2 number, since 2×111131211229² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111131211629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565605614 + 55565605615.

It is an arithmetic number, because the mean of its divisors is an integer number (55565605615).

Almost surely, 2^111131211229 is an apocalyptic number.

It is an amenable number.

111131211229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131211229 is an equidigital number, since it uses as much as digits as its factorization.

111131211229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 25.

The spelling of 111131211229 in words is "one hundred eleven billion, one hundred thirty-one million, two hundred eleven thousand, two hundred twenty-nine".