111213101 has 2 divisors, whose sum is σ = 111213102. Its totient is φ = 111213100.

The previous prime is 111213079. The next prime is 111213103. The reversal of 111213101 is 101312111.

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., 85192900 + 26020201 = 9230^2 + 5101^2 .

It is an emirp because it is prime and its reverse (101312111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111213101 - 2²⁶ = 44104237 is a prime.

Together with 111213103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111213103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606550 + 55606551.

It is an arithmetic number, because the mean of its divisors is an integer number (55606551).

Almost surely, 2^111213101 is an apocalyptic number.

It is an amenable number.

111213101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111213101 is an equidigital number, since it uses as much as digits as its factorization.

111213101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111213101 is about 10545.7622294455. The cubic root of 111213101 is about 480.8969066589.

Adding to 111213101 its reverse (101312111), we get a palindrome (212525212).

The spelling of 111213101 in words is "one hundred eleven million, two hundred thirteen thousand, one hundred one".