221201324124 has 48 divisors (see below), whose sum is σ = 563584990080. Its totient is φ = 66967957440.

The previous prime is 221201324111. The next prime is 221201324129. The reversal of 221201324124 is 421423102122.

It is a junction number, because it is equal to n+sod(n) for n = 221201324094 and 221201324103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201324129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642694 + ... + 924909.

It is an arithmetic number, because the mean of its divisors is an integer number (11741353960).

Almost surely, 2^221201324124 is an apocalyptic number.

It is an amenable number.

221201324124 is an abundant number, since it is smaller than the sum of its proper divisors (342383665956).

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

221201324124 is a wasteful number, since it uses less digits than its factorization.

221201324124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568690 (or 1568688 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221201324124 its reverse (421423102122), we get a palindrome (642624426246).

The spelling of 221201324124 in words is "two hundred twenty-one billion, two hundred one million, three hundred twenty-four thousand, one hundred twenty-four".