1312023100 has 18 divisors (see below), whose sum is σ = 2847090344. Its totient is φ = 524809200.

The previous prime is 1312023091. The next prime is 1312023101. The reversal of 1312023100 is 13202131.

It is a super-2 number, since 2×1312023100² = 3442809229867220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312023101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6560016 + ... + 6560215.

Almost surely, 2^1312023100 is an apocalyptic number.

1312023100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312023100 is an abundant number, since it is smaller than the sum of its proper divisors (1535067244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312023100 is a wasteful number, since it uses less digits than its factorization.

1312023100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120245 (or 13120238 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1312023100 is about 36221.8594221777. The cubic root of 1312023100 is about 1094.7471598485.

Adding to 1312023100 its reverse (13202131), we get a palindrome (1325225231).

The spelling of 1312023100 in words is "one billion, three hundred twelve million, twenty-three thousand, one hundred".