2171172006722 has 16 divisors (see below), whose sum is σ = 3346873092600. Its totient is φ = 1055584389888.

The previous prime is 2171172006721. The next prime is 2171172006727. The reversal of 2171172006722 is 2276002711712.

It can be written as a sum of positive squares in 4 ways, for example, as 2165756665801 + 5415340921 = 1471651^2 + 73589^2 .

It is not an unprimeable number, because it can be changed into a prime (2171172006721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9067847 + ... + 9304202.

Almost surely, 2^{2171172006722} is an apocalyptic number.

2171172006722 is a deficient number, since it is larger than the sum of its proper divisors (1175701085878).

2171172006722 is a wasteful number, since it uses less digits than its factorization.

2171172006722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18373685.

The product of its (nonzero) digits is 32928, while the sum is 38.

The spelling of 2171172006722 in words is "two trillion, one hundred seventy-one billion, one hundred seventy-two million, six thousand, seven hundred twenty-two".