221141236455 has 32 divisors (see below), whose sum is σ = 413831558400. Its totient is φ = 111734518176.

The previous prime is 221141236453. The next prime is 221141236457. The reversal of 221141236455 is 554632141122.

221141236455 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 4 + 1 + 2 + 3 + 645 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (221141236453) and next prime (221141236457).

It is not a de Polignac number, because 221141236455 - 2¹ = 221141236453 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 43104889 + ... + 43110018.

It is an arithmetic number, because the mean of its divisors is an integer number (12932236200).

Almost surely, 2^221141236455 is an apocalyptic number.

221141236455 is a deficient number, since it is larger than the sum of its proper divisors (192690321945).

221141236455 is a wasteful number, since it uses less digits than its factorization.

221141236455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86214940 (or 86214934 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 221141236455 its reverse (554632141122), we get a palindrome (775773377577).

The spelling of 221141236455 in words is "two hundred twenty-one billion, one hundred forty-one million, two hundred thirty-six thousand, four hundred fifty-five".