211111211023 has 2 divisors, whose sum is σ = 211111211024. Its totient is φ = 211111211022.

The previous prime is 211111210963. The next prime is 211111211039. The reversal of 211111211023 is 320112111112.

It is a happy number.

It is an a-pointer prime, because the next prime (211111211039) can be obtained adding 211111211023 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211111211023 - 2¹⁷ = 211111079951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211111210988 and 211111211006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211111211083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555605511 + 105555605512.

It is an arithmetic number, because the mean of its divisors is an integer number (105555605512).

Almost surely, 2^211111211023 is an apocalyptic number.

211111211023 is a deficient number, since it is larger than the sum of its proper divisors (1).

211111211023 is an equidigital number, since it uses as much as digits as its factorization.

211111211023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211111211023 its reverse (320112111112), we get a palindrome (531223322135).

The spelling of 211111211023 in words is "two hundred eleven billion, one hundred eleven million, two hundred eleven thousand, twenty-three".