12071821705 has 16 divisors (see below), whose sum is σ = 14737572864. Its totient is φ = 9491086720.

The previous prime is 12071821691. The next prime is 12071821709. The reversal of 12071821705 is 50712817021.

It is not a de Polignac number, because 12071821705 - 2⁷ = 12071821577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12071821709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3117 + ... + 155413.

It is an arithmetic number, because the mean of its divisors is an integer number (921098304).

Almost surely, 2^12071821705 is an apocalyptic number.

It is an amenable number.

12071821705 is a deficient number, since it is larger than the sum of its proper divisors (2665751159).

12071821705 is a wasteful number, since it uses less digits than its factorization.

12071821705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152576.

The product of its (nonzero) digits is 7840, while the sum is 34.

The spelling of 12071821705 in words is "twelve billion, seventy-one million, eight hundred twenty-one thousand, seven hundred five".