221102231131 has 4 divisors (see below), whose sum is σ = 221103422392. Its totient is φ = 221101039872.

The previous prime is 221102231111. The next prime is 221102231159. The reversal of 221102231131 is 131132201122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221102231131 - 2⁹ = 221102230619 is a prime.

It is a super-2 number, since 2×221102231131² (a number of 23 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 = 221102231099 and 221102231108.

It is not an unprimeable number, because it can be changed into a prime (221102231111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250605 + ... + 710638.

It is an arithmetic number, because the mean of its divisors is an integer number (55275855598).

Almost surely, 2^221102231131 is an apocalyptic number.

221102231131 is a deficient number, since it is larger than the sum of its proper divisors (1191261).

221102231131 is an equidigital number, since it uses as much as digits as its factorization.

221102231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191260.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221102231131 its reverse (131132201122), we get a palindrome (352234432253).

The spelling of 221102231131 in words is "two hundred twenty-one billion, one hundred two million, two hundred thirty-one thousand, one hundred thirty-one".