12212001221012 has 6 divisors (see below), whose sum is σ = 21371002136778. Its totient is φ = 6106000610504.

The previous prime is 12212001221009. The next prime is 12212001221033. The reversal of 12212001221012 is 21012210021221.

It can be written as a sum of positive squares in only one way, i.e., 11174606008336 + 1037395212676 = 3342844^2 + 1018526^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526500152623 + ... + 1526500152630.

It is an arithmetic number, because the mean of its divisors is an integer number (3561833689463).

Almost surely, 2^{12212001221012} is an apocalyptic number.

It is an amenable number.

12212001221012 is a deficient number, since it is larger than the sum of its proper divisors (9159000915766).

12212001221012 is a wasteful number, since it uses less digits than its factorization.

12212001221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053000305257 (or 3053000305255 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12212001221012 its reverse (21012210021221), we get a palindrome (33224211242233).

The spelling of 12212001221012 in words is "twelve trillion, two hundred twelve billion, one million, two hundred twenty-one thousand, twelve".