111301312981 has 2 divisors, whose sum is σ = 111301312982. Its totient is φ = 111301312980.

The previous prime is 111301312973. The next prime is 111301312999. The reversal of 111301312981 is 189213103111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79881977956 + 31419335025 = 282634^2 + 177255^2 .

It is a cyclic number.

It is not a de Polignac number, because 111301312981 - 2³ = 111301312973 is a prime.

It is a super-2 number, since 2×111301312981² (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 (111301312931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55650656490 + 55650656491.

It is an arithmetic number, because the mean of its divisors is an integer number (55650656491).

Almost surely, 2^111301312981 is an apocalyptic number.

It is an amenable number.

111301312981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111301312981 is an equidigital number, since it uses as much as digits as its factorization.

111301312981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 111301312981 in words is "one hundred eleven billion, three hundred one million, three hundred twelve thousand, nine hundred eighty-one".