111015561009973 has 2 divisors, whose sum is σ = 111015561009974. Its totient is φ = 111015561009972.

The previous prime is 111015561009967. The next prime is 111015561010069. The reversal of 111015561009973 is 379900165510111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72221323845969 + 38794237164004 = 8498313^2 + 6228502^2 .

It is a cyclic number.

It is not a de Polignac number, because 111015561009973 - 2²¹ = 111015558912821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111015561009953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55507780504986 + 55507780504987.

It is an arithmetic number, because the mean of its divisors is an integer number (55507780504987).

Almost surely, 2^{111015561009973} is an apocalyptic number.

It is an amenable number.

111015561009973 is a deficient number, since it is larger than the sum of its proper divisors (1).

111015561009973 is an equidigital number, since it uses as much as digits as its factorization.

111015561009973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 255150, while the sum is 49.

The spelling of 111015561009973 in words is "one hundred eleven trillion, fifteen billion, five hundred sixty-one million, nine thousand, nine hundred seventy-three".