1312201005 has 32 divisors (see below), whose sum is σ = 2150668800. Its totient is φ = 682965312.

The previous prime is 1312201001. The next prime is 1312201013. The reversal of 1312201005 is 5001022131.

It is not a de Polignac number, because 1312201005 - 2² = 1312201001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312201001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117682 + ... + 128348.

It is an arithmetic number, because the mean of its divisors is an integer number (67208400).

Almost surely, 2^1312201005 is an apocalyptic number.

1312201005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312201005 is a deficient number, since it is larger than the sum of its proper divisors (838467795).

1312201005 is a wasteful number, since it uses less digits than its factorization.

1312201005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10873.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1312201005 is about 36224.3151073971. The cubic root of 1312201005 is about 1094.7966387008.

Adding to 1312201005 its reverse (5001022131), we get a palindrome (6313223136).

The spelling of 1312201005 in words is "one billion, three hundred twelve million, two hundred one thousand, five".