111023123213 has 2 divisors, whose sum is σ = 111023123214. Its totient is φ = 111023123212.

The previous prime is 111023123179. The next prime is 111023123219. The reversal of 111023123213 is 312321320111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65976032164 + 45047091049 = 256858^2 + 212243^2 .

It is a cyclic number.

It is not a de Polignac number, because 111023123213 - 2¹⁴ = 111023106829 is a prime.

It is a super-2 number, since 2×111023123213² (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 (111023123219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55511561606 + 55511561607.

It is an arithmetic number, because the mean of its divisors is an integer number (55511561607).

Almost surely, 2^111023123213 is an apocalyptic number.

It is an amenable number.

111023123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

111023123213 is an equidigital number, since it uses as much as digits as its factorization.

111023123213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 111023123213 its reverse (312321320111), we get a palindrome (423344443324).

The spelling of 111023123213 in words is "one hundred eleven billion, twenty-three million, one hundred twenty-three thousand, two hundred thirteen".