221313122012 has 12 divisors (see below), whose sum is σ = 387844227960. Its totient is φ = 110500485456.

The previous prime is 221313121979. The next prime is 221313122021. The reversal of 221313122012 is 210221313122.

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, 39015698 + ... + 39021369.

It is an arithmetic number, because the mean of its divisors is an integer number (32320352330).

Almost surely, 2^221313122012 is an apocalyptic number.

It is an amenable number.

221313122012 is a deficient number, since it is larger than the sum of its proper divisors (166531105948).

221313122012 is a wasteful number, since it uses less digits than its factorization.

221313122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78037780 (or 78037778 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221313122012 its reverse (210221313122), we get a palindrome (431534435134).

The spelling of 221313122012 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred twenty-two thousand, twelve".