111061886431021 has 2 divisors, whose sum is σ = 111061886431022. Its totient is φ = 111061886431020.

The previous prime is 111061886431007. The next prime is 111061886431037. The reversal of 111061886431021 is 120134688160111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62122613604100 + 48939272826921 = 7881790^2 + 6995661^2 .

It is a cyclic number.

It is not a de Polignac number, because 111061886431021 - 2¹⁹ = 111061885906733 is a prime.

It is a super-2 number, since 2×111061886431021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111061886431061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55530943215510 + 55530943215511.

It is an arithmetic number, because the mean of its divisors is an integer number (55530943215511).

Almost surely, 2^{111061886431021} is an apocalyptic number.

It is an amenable number.

111061886431021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111061886431021 is an equidigital number, since it uses as much as digits as its factorization.

111061886431021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 111061886431021 in words is "one hundred eleven trillion, sixty-one billion, eight hundred eighty-six million, four hundred thirty-one thousand, twenty-one".