111153742781 has 2 divisors, whose sum is σ = 111153742782. Its totient is φ = 111153742780.

The previous prime is 111153742727. The next prime is 111153742787. The reversal of 111153742781 is 187247351111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111066226756 + 87516025 = 333266^2 + 9355^2 .

It is a cyclic number.

It is not a de Polignac number, because 111153742781 - 2³⁴ = 93973873597 is a prime.

It is a super-2 number, since 2×111153742781² (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 (111153742787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55576871390 + 55576871391.

It is an arithmetic number, because the mean of its divisors is an integer number (55576871391).

Almost surely, 2^111153742781 is an apocalyptic number.

It is an amenable number.

111153742781 is a deficient number, since it is larger than the sum of its proper divisors (1).

111153742781 is an equidigital number, since it uses as much as digits as its factorization.

111153742781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 41.

The spelling of 111153742781 in words is "one hundred eleven billion, one hundred fifty-three million, seven hundred forty-two thousand, seven hundred eighty-one".