221369885663997 has 24 divisors (see below), whose sum is σ = 347695402972800. Its totient is φ = 124895848686336.

The previous prime is 221369885663981. The next prime is 221369885664077. The reversal of 221369885663997 is 799366588963122.

It is not a de Polignac number, because 221369885663997 - 2⁴ = 221369885663981 is a prime.

It is a super-2 number, since 2×221369885663997² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221369885663197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9531112372 + ... + 9531135597.

It is an arithmetic number, because the mean of its divisors is an integer number (14487308457200).

Almost surely, 2^{221369885663997} is an apocalyptic number.

It is an amenable number.

221369885663997 is a deficient number, since it is larger than the sum of its proper divisors (126325517308803).

221369885663997 is a wasteful number, since it uses less digits than its factorization.

221369885663997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19062248065 (or 19062248058 counting only the distinct ones).

The product of its digits is 12697896960, while the sum is 84.

The spelling of 221369885663997 in words is "two hundred twenty-one trillion, three hundred sixty-nine billion, eight hundred eighty-five million, six hundred sixty-three thousand, nine hundred ninety-seven".