1312100210221 has 16 divisors (see below), whose sum is σ = 1388539342080. Its totient is φ = 1237279760640.

The previous prime is 1312100210177. The next prime is 1312100210237. The reversal of 1312100210221 is 1220120012131.

It is a cyclic number.

It is not a de Polignac number, because 1312100210221 - 2²⁹ = 1311563339309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312100210195 and 1312100210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312100210921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29843971 + ... + 29887903.

It is an arithmetic number, because the mean of its divisors is an integer number (86783708880).

Almost surely, 2^{1312100210221} is an apocalyptic number.

It is an amenable number.

1312100210221 is a deficient number, since it is larger than the sum of its proper divisors (76439131859).

1312100210221 is a wasteful number, since it uses less digits than its factorization.

1312100210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62316.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1312100210221 its reverse (1220120012131), we get a palindrome (2532220222352).

The spelling of 1312100210221 in words is "one trillion, three hundred twelve billion, one hundred million, two hundred ten thousand, two hundred twenty-one".