72050016520221 has 16 divisors (see below), whose sum is σ = 96450282887808. Its totient is φ = 47841695193600.

The previous prime is 72050016520219. The next prime is 72050016520231. The reversal of 72050016520221 is 12202561005027.

It is not a de Polignac number, because 72050016520221 - 2¹ = 72050016520219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72050016520201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16543516 + ... + 20439861.

It is an arithmetic number, because the mean of its divisors is an integer number (6028142680488).

Almost surely, 2^{72050016520221} is an apocalyptic number.

It is an amenable number.

72050016520221 is a deficient number, since it is larger than the sum of its proper divisors (24400266367587).

72050016520221 is a wasteful number, since it uses less digits than its factorization.

72050016520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36985972.

The product of its (nonzero) digits is 16800, while the sum is 33.

Adding to 72050016520221 its reverse (12202561005027), we get a palindrome (84252577525248).

The spelling of 72050016520221 in words is "seventy-two trillion, fifty billion, sixteen million, five hundred twenty thousand, two hundred twenty-one".