221141236456 has 32 divisors (see below), whose sum is σ = 473988680640. Its totient is φ = 94751895168.

The previous prime is 221141236453. The next prime is 221141236457. The reversal of 221141236456 is 654632141122.

It is a super-2 number, since 2×221141236456² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221141236451) 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, 242866 + ... + 708001.

It is an arithmetic number, because the mean of its divisors is an integer number (14812146270).

Almost surely, 2^221141236456 is an apocalyptic number.

It is an amenable number.

221141236456 is an abundant number, since it is smaller than the sum of its proper divisors (252847444184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221141236456 is a wasteful number, since it uses less digits than its factorization.

221141236456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955033 (or 955029 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

Adding to 221141236456 its reverse (654632141122), we get a palindrome (875773377578).

The spelling of 221141236456 in words is "two hundred twenty-one billion, one hundred forty-one million, two hundred thirty-six thousand, four hundred fifty-six".