111123132961 has 2 divisors, whose sum is σ = 111123132962. Its totient is φ = 111123132960.

The previous prime is 111123132937. The next prime is 111123133019. The reversal of 111123132961 is 169231321111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62740731361 + 48382401600 = 250481^2 + 219960^2 .

It is a cyclic number.

It is not a de Polignac number, because 111123132961 - 2¹¹ = 111123130913 is a prime.

It is not a weakly prime, because it can be changed into another prime (111123132061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561566480 + 55561566481.

It is an arithmetic number, because the mean of its divisors is an integer number (55561566481).

Almost surely, 2^111123132961 is an apocalyptic number.

It is an amenable number.

111123132961 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123132961 is an equidigital number, since it uses as much as digits as its factorization.

111123132961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 31.

The spelling of 111123132961 in words is "one hundred eleven billion, one hundred twenty-three million, one hundred thirty-two thousand, nine hundred sixty-one".