221131333342 has 32 divisors (see below), whose sum is σ = 342318234240. Its totient is φ = 107076076800.

The previous prime is 221131333337. The next prime is 221131333399. The reversal of 221131333342 is 243333131122.

It is a super-2 number, since 2×221131333342² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221131333342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17814034 + ... + 17826442.

It is an arithmetic number, because the mean of its divisors is an integer number (10697444820).

Almost surely, 2^221131333342 is an apocalyptic number.

221131333342 is a deficient number, since it is larger than the sum of its proper divisors (121186900898).

221131333342 is a wasteful number, since it uses less digits than its factorization.

221131333342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436.

The product of its digits is 7776, while the sum is 28.

Adding to 221131333342 its reverse (243333131122), we get a palindrome (464464464464).

The spelling of 221131333342 in words is "two hundred twenty-one billion, one hundred thirty-one million, three hundred thirty-three thousand, three hundred forty-two".