1222220111012 has 6 divisors (see below), whose sum is σ = 2138885194278. Its totient is φ = 611110055504.

The previous prime is 1222220110987. The next prime is 1222220111017. The reversal of 1222220111012 is 2101110222221.

It can be written as a sum of positive squares in only one way, i.e., 745435384996 + 476784726016 = 863386^2 + 690496^2 .

It is not an unprimeable number, because it can be changed into a prime (1222220111017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152777513873 + ... + 152777513880.

It is an arithmetic number, because the mean of its divisors is an integer number (356480865713).

Almost surely, 2^{1222220111012} is an apocalyptic number.

It is an amenable number.

1222220111012 is a deficient number, since it is larger than the sum of its proper divisors (916665083266).

1222220111012 is a wasteful number, since it uses less digits than its factorization.

1222220111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305555027757 (or 305555027755 counting only the distinct ones).

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

Adding to 1222220111012 its reverse (2101110222221), we get a palindrome (3323330333233).

The spelling of 1222220111012 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, one hundred eleven thousand, twelve".