221115043452 has 12 divisors (see below), whose sum is σ = 515935101416. Its totient is φ = 73705014480.

The previous prime is 221115043451. The next prime is 221115043469. The reversal of 221115043452 is 254340511122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221115043451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9213126799 + ... + 9213126822.

Almost surely, 2^221115043452 is an apocalyptic number.

It is an amenable number.

221115043452 is an abundant number, since it is smaller than the sum of its proper divisors (294820057964).

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

221115043452 is a wasteful number, since it uses less digits than its factorization.

221115043452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18426253628 (or 18426253626 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 221115043452 its reverse (254340511122), we get a palindrome (475455554574).

The spelling of 221115043452 in words is "two hundred twenty-one billion, one hundred fifteen million, forty-three thousand, four hundred fifty-two".