1312002403020 has 144 divisors (see below), whose sum is σ = 4157904022272. Its totient is φ = 334242184320.

The previous prime is 1312002403009. The next prime is 1312002403027. The reversal of 1312002403020 is 203042002131.

1312002403020 is a `hidden beast` number, since 1 + 3 + 120 + 0 + 240 + 302 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1312002402984 and 1312002403002.

It is not an unprimeable number, because it can be changed into a prime (1312002403027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3162159 + ... + 3552921.

It is an arithmetic number, because the mean of its divisors is an integer number (28874333488).

Almost surely, 2^{1312002403020} is an apocalyptic number.

1312002403020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312002403020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2078952011136).

1312002403020 is an abundant number, since it is smaller than the sum of its proper divisors (2845901619252).

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

1312002403020 is a wasteful number, since it uses less digits than its factorization.

1312002403020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391612 (or 391607 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1312002403020 its reverse (203042002131), we get a palindrome (1515044405151).

The spelling of 1312002403020 in words is "one trillion, three hundred twelve billion, two million, four hundred three thousand, twenty".