2171398692601 has 16 divisors (see below), whose sum is σ = 2221731555840. Its totient is φ = 2121239760640.

The previous prime is 2171398692493. The next prime is 2171398692629. The reversal of 2171398692601 is 1062968931712.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2171398692601 - 2¹¹ = 2171398690553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171398692641) 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, 183528756 + ... + 183540586.

It is an arithmetic number, because the mean of its divisors is an integer number (138858222240).

Almost surely, 2^{2171398692601} is an apocalyptic number.

It is an amenable number.

2171398692601 is a deficient number, since it is larger than the sum of its proper divisors (50332863239).

2171398692601 is a wasteful number, since it uses less digits than its factorization.

2171398692601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18824.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 2171398692601 in words is "two trillion, one hundred seventy-one billion, three hundred ninety-eight million, six hundred ninety-two thousand, six hundred one".