221233111131 has 8 divisors (see below), whose sum is σ = 298018486864. Its totient is φ = 145968238080.

The previous prime is 221233111129. The next prime is 221233111147. The reversal of 221233111131 is 131111332122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221233111131 - 2¹ = 221233111129 is a prime.

It is a super-2 number, since 2×221233111131² (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 = 221233111098 and 221233111107.

It is not an unprimeable number, because it can be changed into a prime (221233111171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380125330 + ... + 380125911.

It is an arithmetic number, because the mean of its divisors is an integer number (37252310858).

Almost surely, 2^221233111131 is an apocalyptic number.

221233111131 is a deficient number, since it is larger than the sum of its proper divisors (76785375733).

221233111131 is an equidigital number, since it uses as much as digits as its factorization.

221233111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760251341.

The product of its digits is 216, while the sum is 21.

Adding to 221233111131 its reverse (131111332122), we get a palindrome (352344443253).

The spelling of 221233111131 in words is "two hundred twenty-one billion, two hundred thirty-three million, one hundred eleven thousand, one hundred thirty-one".