1312121354 has 8 divisors (see below), whose sum is σ = 1968335748. Its totient is φ = 656009440.

The previous prime is 1312121341. The next prime is 1312121381. The reversal of 1312121354 is 4531212131.

It can be written as a sum of positive squares in 2 ways, for example, as 1312105729 + 15625 = 36223^2 + 125^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37124 + ... + 63264.

Almost surely, 2^1312121354 is an apocalyptic number.

1312121354 is a deficient number, since it is larger than the sum of its proper divisors (656214394).

1312121354 is a wasteful number, since it uses less digits than its factorization.

1312121354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51240.

The product of its digits is 720, while the sum is 23.

The square root of 1312121354 is about 36223.2156772421. The cubic root of 1312121354 is about 1094.7744867563.

Adding to 1312121354 its reverse (4531212131), we get a palindrome (5843333485).

The spelling of 1312121354 in words is "one billion, three hundred twelve million, one hundred twenty-one thousand, three hundred fifty-four".