221235246136 has 16 divisors (see below), whose sum is σ = 439217033040. Its totient is φ = 104110704000.

The previous prime is 221235246109. The next prime is 221235246143. The reversal of 221235246136 is 631642532122.

It is a junction number, because it is equal to n+sod(n) for n = 221235246095 and 221235246104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813364740 + ... + 813365011.

It is an arithmetic number, because the mean of its divisors is an integer number (27451064565).

Almost surely, 2^221235246136 is an apocalyptic number.

It is an amenable number.

221235246136 is a deficient number, since it is larger than the sum of its proper divisors (217981786904).

221235246136 is a wasteful number, since it uses less digits than its factorization.

221235246136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626729774 (or 1626729770 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

Adding to 221235246136 its reverse (631642532122), we get a palindrome (852877778258).

The spelling of 221235246136 in words is "two hundred twenty-one billion, two hundred thirty-five million, two hundred forty-six thousand, one hundred thirty-six".