2171091523073 has 4 divisors (see below), whose sum is σ = 2368463479728. Its totient is φ = 1973719566420.

The previous prime is 2171091522997. The next prime is 2171091523087. The reversal of 2171091523073 is 3703251901712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2171091523073 - 2³⁴ = 2153911653889 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 2171091523073.

It is not an unprimeable number, because it can be changed into a prime (2171091523373) 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, 98685978311 + ... + 98685978332.

It is an arithmetic number, because the mean of its divisors is an integer number (592115869932).

Almost surely, 2^{2171091523073} is an apocalyptic number.

It is an amenable number.

2171091523073 is a deficient number, since it is larger than the sum of its proper divisors (197371956655).

2171091523073 is a wasteful number, since it uses less digits than its factorization.

2171091523073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197371956654.

The product of its (nonzero) digits is 79380, while the sum is 41.

The spelling of 2171091523073 in words is "two trillion, one hundred seventy-one billion, ninety-one million, five hundred twenty-three thousand, seventy-three".