221111304434212 has 12 divisors (see below), whose sum is σ = 386944893682956. Its totient is φ = 110555620524800.

The previous prime is 221111304434179. The next prime is 221111304434231. The reversal of 221111304434212 is 212434403111122.

It can be written as a sum of positive squares in 2 ways, for example, as 109500193206756 + 111611111227456 = 10464234^2 + 10564616^2 .

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, 15409212 + ... + 26070412.

It is an arithmetic number, because the mean of its divisors is an integer number (32245407806913).

Almost surely, 2^{221111304434212} is an apocalyptic number.

It is an amenable number.

221111304434212 is a deficient number, since it is larger than the sum of its proper divisors (165833589248744).

221111304434212 is a wasteful number, since it uses less digits than its factorization.

221111304434212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15846158 (or 15846156 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 221111304434212 its reverse (212434403111122), we get a palindrome (433545707545334).

The spelling of 221111304434212 in words is "two hundred twenty-one trillion, one hundred eleven billion, three hundred four million, four hundred thirty-four thousand, two hundred twelve".