221434122501 has 12 divisors (see below), whose sum is σ = 324623158912. Its totient is φ = 145419423336.

The previous prime is 221434122491. The next prime is 221434122509. The reversal of 221434122501 is 105221434122.

221434122501 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 34 + 122 + 501 = 666.

It is not a de Polignac number, because 221434122501 - 2¹⁵ = 221434089733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221434122509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183609781 + ... + 183610986.

Almost surely, 2^221434122501 is an apocalyptic number.

It is an amenable number.

221434122501 is a deficient number, since it is larger than the sum of its proper divisors (103189036411).

221434122501 is a wasteful number, since it uses less digits than its factorization.

221434122501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367220840 (or 367220837 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 221434122501 its reverse (105221434122), we get a palindrome (326655556623).

The spelling of 221434122501 in words is "two hundred twenty-one billion, four hundred thirty-four million, one hundred twenty-two thousand, five hundred one".