111015561010061 has 4 divisors (see below), whose sum is σ = 111021129348252. Its totient is φ = 111009992671872.

The previous prime is 111015561009973. The next prime is 111015561010069. The reversal of 111015561010061 is 160010165510111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6217467445225 + 104798093564836 = 2493485^2 + 10237094^2 .

It is a cyclic number.

It is not a de Polignac number, because 111015561010061 - 2³⁸ = 110740683103117 is a prime.

It is a super-2 number, since 2×111015561010061² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111015561010069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2784139190 + ... + 2784179063.

It is an arithmetic number, because the mean of its divisors is an integer number (27755282337063).

Almost surely, 2^{111015561010061} is an apocalyptic number.

It is an amenable number.

111015561010061 is a deficient number, since it is larger than the sum of its proper divisors (5568338191).

111015561010061 is an equidigital number, since it uses as much as digits as its factorization.

111015561010061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5568338190.

The product of its (nonzero) digits is 900, while the sum is 29.

The spelling of 111015561010061 in words is "one hundred eleven trillion, fifteen billion, five hundred sixty-one million, ten thousand, sixty-one".