221131100231109 has 24 divisors (see below), whose sum is σ = 319729990274240. Its totient is φ = 147273808156992.

The previous prime is 221131100231101. The next prime is 221131100231137. The reversal of 221131100231109 is 901132001131122.

221131100231109 is a `hidden beast` number, since 2 + 2 + 11 + 311 + 0 + 0 + 231 + 109 = 666.

It is not a de Polignac number, because 221131100231109 - 2³ = 221131100231101 is a prime.

It is a super-2 number, since 2×221131100231109² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131100231101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90682632 + ... + 93089214.

Almost surely, 2^{221131100231109} is an apocalyptic number.

It is an amenable number.

221131100231109 is a deficient number, since it is larger than the sum of its proper divisors (98598890043131).

221131100231109 is a wasteful number, since it uses less digits than its factorization.

221131100231109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416761 (or 2416758 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 221131100231109 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred million, two hundred thirty-one thousand, one hundred nine".