111121586813 has 2 divisors, whose sum is σ = 111121586814. Its totient is φ = 111121586812.

The previous prime is 111121586809. The next prime is 111121586819. The reversal of 111121586813 is 318685121111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110052754564 + 1068832249 = 331742^2 + 32693^2 .

It is a cyclic number.

It is not a de Polignac number, because 111121586813 - 2² = 111121586809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121586819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560793406 + 55560793407.

It is an arithmetic number, because the mean of its divisors is an integer number (55560793407).

Almost surely, 2^111121586813 is an apocalyptic number.

It is an amenable number.

111121586813 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121586813 is an equidigital number, since it uses as much as digits as its factorization.

111121586813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 38.

The spelling of 111121586813 in words is "one hundred eleven billion, one hundred twenty-one million, five hundred eighty-six thousand, eight hundred thirteen".