221455412001 has 6 divisors (see below), whose sum is σ = 319880039570. Its totient is φ = 147636941328.

The previous prime is 221455411999. The next prime is 221455412011. The reversal of 221455412001 is 100214554122.

It is a happy number.

221455412001 is a `hidden beast` number, since 2 + 2 + 1 + 455 + 4 + 1 + 200 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 200861726976 + 20593685025 = 448176^2 + 143505^2 .

It is not a de Polignac number, because 221455412001 - 2¹ = 221455411999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221455412011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12303078436 + ... + 12303078453.

Almost surely, 2^221455412001 is an apocalyptic number.

It is an amenable number.

221455412001 is a deficient number, since it is larger than the sum of its proper divisors (98424627569).

221455412001 is a wasteful number, since it uses less digits than its factorization.

221455412001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24606156895 (or 24606156892 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 221455412001 its reverse (100214554122), we get a palindrome (321669966123).

The spelling of 221455412001 in words is "two hundred twenty-one billion, four hundred fifty-five million, four hundred twelve thousand, one".