1312220311222 has 4 divisors (see below), whose sum is σ = 1968330466836. Its totient is φ = 656110155610.

The previous prime is 1312220311219. The next prime is 1312220311231. The reversal of 1312220311222 is 2221130222131.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1312220311193 and 1312220311202.

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, 328055077804 + ... + 328055077807.

It is an arithmetic number, because the mean of its divisors is an integer number (492082616709).

Almost surely, 2^{1312220311222} is an apocalyptic number.

1312220311222 is a deficient number, since it is larger than the sum of its proper divisors (656110155614).

1312220311222 is an equidigital number, since it uses as much as digits as its factorization.

1312220311222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656110155613.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1312220311222 its reverse (2221130222131), we get a palindrome (3533350533353).

The spelling of 1312220311222 in words is "one trillion, three hundred twelve billion, two hundred twenty million, three hundred eleven thousand, two hundred twenty-two".