1212231022216 has 8 divisors (see below), whose sum is σ = 2272933166670. Its totient is φ = 606115511104.

The previous prime is 1212231022147. The next prime is 1212231022217. The reversal of 1212231022216 is 6122201322121.

It can be written as a sum of positive squares in only one way, i.e., 1096950401316 + 115280620900 = 1047354^2 + 339530^2 .

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 (1212231022217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75764438881 + ... + 75764438896.

Almost surely, 2^{1212231022216} is an apocalyptic number.

It is an amenable number.

1212231022216 is a deficient number, since it is larger than the sum of its proper divisors (1060702144454).

1212231022216 is a wasteful number, since it uses less digits than its factorization.

1212231022216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151528877783 (or 151528877779 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1212231022216 its reverse (6122201322121), we get a palindrome (7334432344337).

The spelling of 1212231022216 in words is "one trillion, two hundred twelve billion, two hundred thirty-one million, twenty-two thousand, two hundred sixteen".