221303111111031 has 32 divisors (see below), whose sum is σ = 305351185054720. Its totient is φ = 142456740806016.

The previous prime is 221303111110979. The next prime is 221303111111099. The reversal of 221303111111031 is 130111111303122.

It is not a de Polignac number, because 221303111111031 - 2¹³ = 221303111102839 is a prime.

It is a super-2 number, since 2×221303111111031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221303111110989 and 221303111111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221303111111431) 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 31 ways as a sum of consecutive naturals, for example, 34657650 + ... + 40543296.

It is an arithmetic number, because the mean of its divisors is an integer number (9542224532960).

Almost surely, 2^{221303111111031} is an apocalyptic number.

221303111111031 is a deficient number, since it is larger than the sum of its proper divisors (84048073943689).

221303111111031 is a wasteful number, since it uses less digits than its factorization.

221303111111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888263.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 221303111111031 its reverse (130111111303122), we get a palindrome (351414222414153).

The spelling of 221303111111031 in words is "two hundred twenty-one trillion, three hundred three billion, one hundred eleven million, one hundred eleven thousand, thirty-one".