1312223200221 has 32 divisors (see below), whose sum is σ = 1976766215040. Its totient is φ = 769335957504.

The previous prime is 1312223200217. The next prime is 1312223200229. The reversal of 1312223200221 is 1220023222131.

It is not a de Polignac number, because 1312223200221 - 2² = 1312223200217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312223200229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9204630 + ... + 9346103.

It is an arithmetic number, because the mean of its divisors is an integer number (61773944220).

Almost surely, 2^{1312223200221} is an apocalyptic number.

It is an amenable number.

1312223200221 is a deficient number, since it is larger than the sum of its proper divisors (664543014819).

1312223200221 is a wasteful number, since it uses less digits than its factorization.

1312223200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18550845.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1312223200221 its reverse (1220023222131), we get a palindrome (2532246422352).

The spelling of 1312223200221 in words is "one trillion, three hundred twelve billion, two hundred twenty-three million, two hundred thousand, two hundred twenty-one".