111110131381 has 2 divisors, whose sum is σ = 111110131382. Its totient is φ = 111110131380.

The previous prime is 111110131337. The next prime is 111110131399. The reversal of 111110131381 is 183131011111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73059387025 + 38050744356 = 270295^2 + 195066^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110131381 - 2³¹ = 108962647733 is a prime.

It is a super-2 number, since 2×111110131381² (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 (111110131681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555065690 + 55555065691.

It is an arithmetic number, because the mean of its divisors is an integer number (55555065691).

Almost surely, 2^111110131381 is an apocalyptic number.

It is an amenable number.

111110131381 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110131381 is an equidigital number, since it uses as much as digits as its factorization.

111110131381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 111110131381 its reverse (183131011111), we get a palindrome (294241142492).

The spelling of 111110131381 in words is "one hundred eleven billion, one hundred ten million, one hundred thirty-one thousand, three hundred eighty-one".