221333011131 has 32 divisors (see below), whose sum is σ = 325794839040. Its totient is φ = 133032582144.

The previous prime is 221333011099. The next prime is 221333011217. The reversal of 221333011131 is 131110333122.

It is a happy number.

It is not a de Polignac number, because 221333011131 - 2⁵ = 221333011099 is a prime.

It is a super-2 number, since 2×221333011131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221333011098 and 221333011107.

It is not an unprimeable number, because it can be changed into a prime (221333011331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170230 + ... + 686763.

It is an arithmetic number, because the mean of its divisors is an integer number (10181088720).

Almost surely, 2^221333011131 is an apocalyptic number.

221333011131 is a deficient number, since it is larger than the sum of its proper divisors (104461827909).

221333011131 is a wasteful number, since it uses less digits than its factorization.

221333011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857235.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 221333011131 its reverse (131110333122), we get a palindrome (352443344253).

The spelling of 221333011131 in words is "two hundred twenty-one billion, three hundred thirty-three million, eleven thousand, one hundred thirty-one".