1312122202121 has 8 divisors (see below), whose sum is σ = 1328773226880. Its totient is φ = 1295472224592.

The previous prime is 1312122202081. The next prime is 1312122202159. The reversal of 1312122202121 is 1212022212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312122202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312122202093 and 1312122202102.

It is not an unprimeable number, because it can be changed into a prime (1312122201121) 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, 2435111 + ... + 2924723.

It is an arithmetic number, because the mean of its divisors is an integer number (166096653360).

Almost surely, 2^{1312122202121} is an apocalyptic number.

It is an amenable number.

1312122202121 is a deficient number, since it is larger than the sum of its proper divisors (16651024759).

1312122202121 is an equidigital number, since it uses as much as digits as its factorization.

1312122202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523615.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1312122202121 its reverse (1212022212131), we get a palindrome (2524144414252).

The spelling of 1312122202121 in words is "one trillion, three hundred twelve billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-one".