31112032121109 has 10 divisors (see below), whose sum is σ = 46475998600790. Its totient is φ = 20741354747352.

The previous prime is 31112032121077. The next prime is 31112032121119. The reversal of 31112032121109 is 90112123021113.

31112032121109 is a `hidden beast` number, since 3 + 1 + 1 + 120 + 321 + 211 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29073070883025 + 2038961238084 = 5391945^2 + 1427922^2 .

It is not a de Polignac number, because 31112032121109 - 2⁵ = 31112032121077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112032121119) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 192049580914 + ... + 192049581075.

It is an arithmetic number, because the mean of its divisors is an integer number (4647599860079).

Almost surely, 2^{31112032121109} is an apocalyptic number.

It is an amenable number.

31112032121109 is a deficient number, since it is larger than the sum of its proper divisors (15363966479681).

31112032121109 is an equidigital number, since it uses as much as digits as its factorization.

31112032121109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384099162001 (or 384099161992 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 31112032121109 in words is "thirty-one trillion, one hundred twelve billion, thirty-two million, one hundred twenty-one thousand, one hundred nine".