1320861807123 has 8 divisors (see below), whose sum is σ = 1761161017488. Its totient is φ = 880568567424.

The previous prime is 1320861807113. The next prime is 1320861807211. The reversal of 1320861807123 is 3217081680231.

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

It is not a de Polignac number, because 1320861807123 - 2⁸ = 1320861806867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320861807113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948090 + ... + 1881647.

It is an arithmetic number, because the mean of its divisors is an integer number (220145127186).

Almost surely, 2^{1320861807123} is an apocalyptic number.

1320861807123 is a deficient number, since it is larger than the sum of its proper divisors (440299210365).

1320861807123 is a wasteful number, since it uses less digits than its factorization.

1320861807123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985333.

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 1320861807123 in words is "one trillion, three hundred twenty billion, eight hundred sixty-one million, eight hundred seven thousand, one hundred twenty-three".