221244240124 has 24 divisors (see below), whose sum is σ = 404266705920. Its totient is φ = 105745550064.

The previous prime is 221244240121. The next prime is 221244240127. The reversal of 221244240124 is 421042442122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221244240121) and next prime (221244240127).

It is a junction number, because it is equal to n+sod(n) for n = 221244240092 and 221244240101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221244240121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613944 + ... + 905215.

It is an arithmetic number, because the mean of its divisors is an integer number (16844446080).

Almost surely, 2^221244240124 is an apocalyptic number.

It is an amenable number.

221244240124 is a deficient number, since it is larger than the sum of its proper divisors (183022465796).

221244240124 is a wasteful number, since it uses less digits than its factorization.

221244240124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520769 (or 1520767 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 221244240124 its reverse (421042442122), we get a palindrome (642286682246).

The spelling of 221244240124 in words is "two hundred twenty-one billion, two hundred forty-four million, two hundred forty thousand, one hundred twenty-four".