1111211212229 has 2 divisors, whose sum is σ = 1111211212230. Its totient is φ = 1111211212228.

The previous prime is 1111211212183. The next prime is 1111211212249. The reversal of 1111211212229 is 9222121121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1022731735204 + 88479477025 = 1011302^2 + 297455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111211212229 - 2⁸ = 1111211211973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111211212198 and 1111211212207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111211212249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555605606114 + 555605606115.

It is an arithmetic number, because the mean of its divisors is an integer number (555605606115).

Almost surely, 2^{1111211212229} is an apocalyptic number.

It is an amenable number.

1111211212229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111211212229 is an equidigital number, since it uses as much as digits as its factorization.

1111211212229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 26.

The spelling of 1111211212229 in words is "one trillion, one hundred eleven billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-nine".