111061551061 has 2 divisors, whose sum is σ = 111061551062. Its totient is φ = 111061551060.

The previous prime is 111061551059. The next prime is 111061551151. The reversal of 111061551061 is 160155160111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94159991025 + 16901560036 = 306855^2 + 130006^2 .

It is a cyclic number.

It is not a de Polignac number, because 111061551061 - 2¹ = 111061551059 is a prime.

It is a super-2 number, since 2×111061551061² (a number of 23 digits) contains 22 as substring.

Together with 111061551059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111061551661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55530775530 + 55530775531.

It is an arithmetic number, because the mean of its divisors is an integer number (55530775531).

Almost surely, 2^111061551061 is an apocalyptic number.

It is an amenable number.

111061551061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111061551061 is an equidigital number, since it uses as much as digits as its factorization.

111061551061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 28.

The spelling of 111061551061 in words is "one hundred eleven billion, sixty-one million, five hundred fifty-one thousand, sixty-one".