1223211031111 has 2 divisors, whose sum is σ = 1223211031112. Its totient is φ = 1223211031110.

The previous prime is 1223211031079. The next prime is 1223211031117. The reversal of 1223211031111 is 1111301123221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1111301123221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223211031111 - 2⁵ = 1223211031079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223211031117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611605515555 + 611605515556.

It is an arithmetic number, because the mean of its divisors is an integer number (611605515556).

Almost surely, 2^{1223211031111} is an apocalyptic number.

1223211031111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223211031111 is an equidigital number, since it uses as much as digits as its factorization.

1223211031111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1223211031111 its reverse (1111301123221), we get a palindrome (2334512154332).

The spelling of 1223211031111 in words is "one trillion, two hundred twenty-three billion, two hundred eleven million, thirty-one thousand, one hundred eleven".