221369585816994 has 16 divisors (see below), whose sum is σ = 443895148588032. Its totient is φ = 73597199113328.

The previous prime is 221369585816957. The next prime is 221369585816999. The reversal of 221369585816994 is 499618585963122.

It is a super-2 number, since 2×221369585816994² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221369585816999) 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, 48165703929 + ... + 48165708524.

It is an arithmetic number, because the mean of its divisors is an integer number (27743446786752).

Almost surely, 2^{221369585816994} is an apocalyptic number.

221369585816994 is an abundant number, since it is smaller than the sum of its proper divisors (222525562771038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221369585816994 is a wasteful number, since it uses less digits than its factorization.

221369585816994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96331412841.

The product of its digits is 2015539200, while the sum is 78.

The spelling of 221369585816994 in words is "two hundred twenty-one trillion, three hundred sixty-nine billion, five hundred eighty-five million, eight hundred sixteen thousand, nine hundred ninety-four".