72221110005171 has 16 divisors (see below), whose sum is σ = 98759110453920. Its totient is φ = 46918011521280.

The previous prime is 72221110005071. The next prime is 72221110005223. The reversal of 72221110005171 is 17150001112227.

It is not a de Polignac number, because 72221110005171 - 2¹⁷ = 72221109874099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72221110005071) 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, 344070636 + ... + 344280473.

It is an arithmetic number, because the mean of its divisors is an integer number (6172444403370).

Almost surely, 2^{72221110005171} is an apocalyptic number.

72221110005171 is a deficient number, since it is larger than the sum of its proper divisors (26538000448749).

72221110005171 is a wasteful number, since it uses less digits than its factorization.

72221110005171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688352006.

The product of its (nonzero) digits is 1960, while the sum is 30.

Adding to 72221110005171 its reverse (17150001112227), we get a palindrome (89371111117398).

The spelling of 72221110005171 in words is "seventy-two trillion, two hundred twenty-one billion, one hundred ten million, five thousand, one hundred seventy-one".