221111031111318 has 24 divisors (see below), whose sum is σ = 482846136185088. Its totient is φ = 73123333122672.

The previous prime is 221111031111317. The next prime is 221111031111329. The reversal of 221111031111318 is 813111130111122.

221111031111318 is a `hidden beast` number, since 2 + 2 + 1 + 11 + 10 + 311 + 11 + 318 = 666.

It is a super-2 number, since 2×221111031111318² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221111031111291 and 221111031111300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111031111317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48361990521 + ... + 48361995092.

It is an arithmetic number, because the mean of its divisors is an integer number (20118589007712).

Almost surely, 2^{221111031111318} is an apocalyptic number.

221111031111318 is an abundant number, since it is smaller than the sum of its proper divisors (261735105073770).

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

221111031111318 is a wasteful number, since it uses less digits than its factorization.

221111031111318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96723985748 (or 96723985745 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 27.

The spelling of 221111031111318 in words is "two hundred twenty-one trillion, one hundred eleven billion, thirty-one million, one hundred eleven thousand, three hundred eighteen".