1312100123 has 8 divisors (see below), whose sum is σ = 1318979376. Its totient is φ = 1305232000.

The previous prime is 1312100117. The next prime is 1312100149. The reversal of 1312100123 is 3210012131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312100123 - 2¹⁸ = 1311837979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312100098 and 1312100107.

It is not an unprimeable number, because it can be changed into a prime (1312100173) 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, 336143 + ... + 340023.

It is an arithmetic number, because the mean of its divisors is an integer number (164872422).

Almost surely, 2^1312100123 is an apocalyptic number.

1312100123 is a deficient number, since it is larger than the sum of its proper divisors (6879253).

1312100123 is a wasteful number, since it uses less digits than its factorization.

1312100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1312100123 is about 36222.9226181433. The cubic root of 1312100123 is about 1094.7685819969.

Adding to 1312100123 its reverse (3210012131), we get a palindrome (4522112254).

The spelling of 1312100123 in words is "one billion, three hundred twelve million, one hundred thousand, one hundred twenty-three".