111213112321 has 2 divisors, whose sum is σ = 111213112322. Its totient is φ = 111213112320.

The previous prime is 111213112301. The next prime is 111213112327. The reversal of 111213112321 is 123211312111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82190582721 + 29022529600 = 286689^2 + 170360^2 .

It is an emirp because it is prime and its reverse (123211312111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111213112321 - 2¹³ = 111213104129 is a prime.

It is not a weakly prime, because it can be changed into another prime (111213112327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606556160 + 55606556161.

It is an arithmetic number, because the mean of its divisors is an integer number (55606556161).

Almost surely, 2^111213112321 is an apocalyptic number.

It is an amenable number.

111213112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111213112321 is an equidigital number, since it uses as much as digits as its factorization.

111213112321 is an evil number, because the sum of its binary digits is even.

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

Adding to 111213112321 its reverse (123211312111), we get a palindrome (234424424432).

The spelling of 111213112321 in words is "one hundred eleven billion, two hundred thirteen million, one hundred twelve thousand, three hundred twenty-one".