12212120072 has 8 divisors (see below), whose sum is σ = 22897725150. Its totient is φ = 6106060032.

The previous prime is 12212120071. The next prime is 12212120077. The reversal of 12212120072 is 27002121221.

It can be written as a sum of positive squares in only one way, i.e., 9614586916 + 2597533156 = 98054^2 + 50966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12212120071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763257497 + ... + 763257512.

Almost surely, 2^12212120072 is an apocalyptic number.

It is an amenable number.

12212120072 is a deficient number, since it is larger than the sum of its proper divisors (10685605078).

12212120072 is a wasteful number, since it uses less digits than its factorization.

12212120072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526515015 (or 1526515011 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 12212120072 its reverse (27002121221), we get a palindrome (39214241293).

The spelling of 12212120072 in words is "twelve billion, two hundred twelve million, one hundred twenty thousand, seventy-two".