1312120123229 has 4 divisors (see below), whose sum is σ = 1312130723580. Its totient is φ = 1312109522880.

The previous prime is 1312120123211. The next prime is 1312120123231. The reversal of 1312120123229 is 9223210212131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 541104417604 + 771015705625 = 735598^2 + 878075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312120123229 - 2¹² = 1312120119133 is a prime.

It is a super-2 number, since 2×1312120123229² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312120123129) 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 3 ways as a sum of consecutive naturals, for example, 5112284 + ... + 5362805.

It is an arithmetic number, because the mean of its divisors is an integer number (328032680895).

Almost surely, 2^{1312120123229} is an apocalyptic number.

It is an amenable number.

1312120123229 is a deficient number, since it is larger than the sum of its proper divisors (10600351).

1312120123229 is a wasteful number, since it uses less digits than its factorization.

1312120123229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600350.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 1312120123229 in words is "one trillion, three hundred twelve billion, one hundred twenty million, one hundred twenty-three thousand, two hundred twenty-nine".