1312020203 has 16 divisors (see below), whose sum is σ = 1497877920. Its totient is φ = 1138469376.

The previous prime is 1312020173. The next prime is 1312020221. The reversal of 1312020203 is 3020202131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1312020203 - 2¹⁶ = 1311954667 is a prime.

It is a super-2 number, since 2×1312020203² = 3442794026160322418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312020103) 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 15 ways as a sum of consecutive naturals, for example, 206153 + ... + 212421.

It is an arithmetic number, because the mean of its divisors is an integer number (93617370).

Almost surely, 2^1312020203 is an apocalyptic number.

1312020203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312020203 is a deficient number, since it is larger than the sum of its proper divisors (185857717).

1312020203 is a wasteful number, since it uses less digits than its factorization.

1312020203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1312020203 is about 36221.8194324912. The cubic root of 1312020203 is about 1094.7463540993.

Adding to 1312020203 its reverse (3020202131), we get a palindrome (4332222334).

The spelling of 1312020203 in words is "one billion, three hundred twelve million, twenty thousand, two hundred three".