2180571823221 has 8 divisors (see below), whose sum is σ = 3171740833824. Its totient is φ = 1321558680720.

The previous prime is 2180571823211. The next prime is 2180571823223. The reversal of 2180571823221 is 1223281750812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2180571823221 - 2¹¹ = 2180571821173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180571823223) 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, 33038966986 + ... + 33038967051.

It is an arithmetic number, because the mean of its divisors is an integer number (396467604228).

Almost surely, 2^{2180571823221} is an apocalyptic number.

It is an amenable number.

2180571823221 is a deficient number, since it is larger than the sum of its proper divisors (991169010603).

2180571823221 is a wasteful number, since it uses less digits than its factorization.

2180571823221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66077934051.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 2180571823221 in words is "two trillion, one hundred eighty billion, five hundred seventy-one million, eight hundred twenty-three thousand, two hundred twenty-one".