1312323212121 has 8 divisors (see below), whose sum is σ = 1751165220000. Its totient is φ = 874181672832.

The previous prime is 1312323212093. The next prime is 1312323212129. The reversal of 1312323212121 is 1212123232131.

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

It is not a de Polignac number, because 1312323212121 - 2²² = 1312319017817 is a prime.

It is a super-2 number, since 2×1312323212121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1312323212091 and 1312323212100.

It is not an unprimeable number, because it can be changed into a prime (1312323212129) 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 7 ways as a sum of consecutive naturals, for example, 175112775 + ... + 175120268.

It is an arithmetic number, because the mean of its divisors is an integer number (218895652500).

Almost surely, 2^{1312323212121} is an apocalyptic number.

It is an amenable number.

1312323212121 is a deficient number, since it is larger than the sum of its proper divisors (438842007879).

1312323212121 is a wasteful number, since it uses less digits than its factorization.

1312323212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350234295.

The product of its digits is 864, while the sum is 24.

Adding to 1312323212121 its reverse (1212123232131), we get a palindrome (2524446444252).

The spelling of 1312323212121 in words is "one trillion, three hundred twelve billion, three hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".