1312220012222 has 16 divisors (see below), whose sum is σ = 2250848779872. Its totient is φ = 562047815520.

The previous prime is 1312220012221. The next prime is 1312220012237. The reversal of 1312220012222 is 2222100222131.

It is a junction number, because it is equal to n+sod(n) for n = 1312220012194 and 1312220012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312220012221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27657929 + ... + 27705332.

It is an arithmetic number, because the mean of its divisors is an integer number (140678048742).

Almost surely, 2^{1312220012222} is an apocalyptic number.

1312220012222 is a deficient number, since it is larger than the sum of its proper divisors (938628767650).

1312220012222 is a wasteful number, since it uses less digits than its factorization.

1312220012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55364963.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1312220012222 its reverse (2222100222131), we get a palindrome (3534320234353).

The spelling of 1312220012222 in words is "one trillion, three hundred twelve billion, two hundred twenty million, twelve thousand, two hundred twenty-two".