11312120111 has 2 divisors, whose sum is σ = 11312120112. Its totient is φ = 11312120110.

The previous prime is 11312120087. The next prime is 11312120119. The reversal of 11312120111 is 11102121311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11312120111 - 2²² = 11307925807 is a prime.

It is a super-2 number, since 2×11312120111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11312120119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656060055 + 5656060056.

It is an arithmetic number, because the mean of its divisors is an integer number (5656060056).

Almost surely, 2^11312120111 is an apocalyptic number.

11312120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312120111 is an equidigital number, since it uses as much as digits as its factorization.

11312120111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11312120111 its reverse (11102121311), we get a palindrome (22414241422).

The spelling of 11312120111 in words is "eleven billion, three hundred twelve million, one hundred twenty thousand, one hundred eleven".