1312020123 has 8 divisors (see below), whose sum is σ = 1749539088. Its totient is φ = 874590624.

The previous prime is 1312020113. The next prime is 1312020133. The reversal of 1312020123 is 3210202131.

It is an interprime number because it is at equal distance from previous prime (1312020113) and next prime (1312020133).

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

It is not a de Polignac number, because 1312020123 - 2⁸ = 1312019867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312020103) 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, 28165 + ... + 58457.

It is an arithmetic number, because the mean of its divisors is an integer number (218692386).

Almost surely, 2^1312020123 is an apocalyptic number.

1312020123 is a deficient number, since it is larger than the sum of its proper divisors (437518965).

1312020123 is a wasteful number, since it uses less digits than its factorization.

1312020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44733.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312020123 is about 36221.8183281845. The cubic root of 1312020123 is about 1094.7463318487.

Adding to 1312020123 its reverse (3210202131), we get a palindrome (4522222254).

The spelling of 1312020123 in words is "one billion, three hundred twelve million, twenty thousand, one hundred twenty-three".