1312121444145 has 64 divisors (see below), whose sum is σ = 2165930274816. Its totient is φ = 677934074880.

The previous prime is 1312121444129. The next prime is 1312121444197. The reversal of 1312121444145 is 5414441212131.

It is not a de Polignac number, because 1312121444145 - 2⁴ = 1312121444129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97832490 + ... + 97845900.

It is an arithmetic number, because the mean of its divisors is an integer number (33842660544).

Almost surely, 2^{1312121444145} is an apocalyptic number.

1312121444145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312121444145 is a deficient number, since it is larger than the sum of its proper divisors (853808830671).

1312121444145 is a wasteful number, since it uses less digits than its factorization.

1312121444145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14870.

The product of its digits is 15360, while the sum is 33.

Adding to 1312121444145 its reverse (5414441212131), we get a palindrome (6726562656276).

The spelling of 1312121444145 in words is "one trillion, three hundred twelve billion, one hundred twenty-one million, four hundred forty-four thousand, one hundred forty-five".