12020572105 has 4 divisors (see below), whose sum is σ = 14424686532. Its totient is φ = 9616457680.

The previous prime is 12020572103. The next prime is 12020572117. The reversal of 12020572105 is 50127502021.

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 8343726336 + 3676845769 = 91344^2 + 60637^2 .

It is not a de Polignac number, because 12020572105 - 2¹ = 12020572103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12020572105.

It is not an unprimeable number, because it can be changed into a prime (12020572103) 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, 1202057206 + ... + 1202057215.

It is an arithmetic number, because the mean of its divisors is an integer number (3606171633).

Almost surely, 2^12020572105 is an apocalyptic number.

It is an amenable number.

12020572105 is a deficient number, since it is larger than the sum of its proper divisors (2404114427).

12020572105 is an equidigital number, since it uses as much as digits as its factorization.

12020572105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404114426.

The product of its (nonzero) digits is 1400, while the sum is 25.

The spelling of 12020572105 in words is "twelve billion, twenty million, five hundred seventy-two thousand, one hundred five".