221011223431442 has 12 divisors (see below), whose sum is σ = 346557296478750. Its totient is φ = 105701019901488.

The previous prime is 221011223431351. The next prime is 221011223431541. The reversal of 221011223431442 is 244134322110122.

It can be written as a sum of positive squares in only one way, i.e., 113064920973601 + 107946302457841 = 10633199^2 + 10389721^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221011223431399 and 221011223431408.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104447647067 + ... + 104447649182.

Almost surely, 2^{221011223431442} is an apocalyptic number.

221011223431442 is a deficient number, since it is larger than the sum of its proper divisors (125546073047308).

221011223431442 is a wasteful number, since it uses less digits than its factorization.

221011223431442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208895296297 (or 208895296274 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 221011223431442 its reverse (244134322110122), we get a palindrome (465145545541564).

The spelling of 221011223431442 in words is "two hundred twenty-one trillion, eleven billion, two hundred twenty-three million, four hundred thirty-one thousand, four hundred forty-two".