11112122201231 has 2 divisors, whose sum is σ = 11112122201232. Its totient is φ = 11112122201230.

The previous prime is 11112122201209. The next prime is 11112122201317. The reversal of 11112122201231 is 13210222121111.

11112122201231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112122201231 is a prime.

It is a super-2 number, since 2×11112122201231² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112122207231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556061100615 + 5556061100616.

It is an arithmetic number, because the mean of its divisors is an integer number (5556061100616).

Almost surely, 2^{11112122201231} is an apocalyptic number.

11112122201231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112122201231 is an equidigital number, since it uses as much as digits as its factorization.

11112122201231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11112122201231 its reverse (13210222121111), we get a palindrome (24322344322342).

The spelling of 11112122201231 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-two million, two hundred one thousand, two hundred thirty-one".