221001014452 has 6 divisors (see below), whose sum is σ = 386751775298. Its totient is φ = 110500507224.

The previous prime is 221001014431. The next prime is 221001014453. The reversal of 221001014452 is 254410100122.

It can be written as a sum of positive squares in only one way, i.e., 209696221476 + 11304792976 = 457926^2 + 106324^2 .

It is a super-2 number, since 2×221001014452² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001014453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625126803 + ... + 27625126810.

Almost surely, 2^221001014452 is an apocalyptic number.

It is an amenable number.

221001014452 is a deficient number, since it is larger than the sum of its proper divisors (165750760846).

221001014452 is a wasteful number, since it uses less digits than its factorization.

221001014452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55250253617 (or 55250253615 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 221001014452 its reverse (254410100122), we get a palindrome (475411114574).

The spelling of 221001014452 in words is "two hundred twenty-one billion, one million, fourteen thousand, four hundred fifty-two".