1301311020 has 48 divisors (see below), whose sum is σ = 3802095360. Its totient is φ = 331928256.

The previous prime is 1301311001. The next prime is 1301311031. The reversal of 1301311020 is 201131031.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1301310987 and 1301311005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470110 + ... + 472869.

It is an arithmetic number, because the mean of its divisors is an integer number (79210320).

Almost surely, 2^1301311020 is an apocalyptic number.

1301311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301311020 is an abundant number, since it is smaller than the sum of its proper divisors (2500784340).

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

1301311020 is a wasteful number, since it uses less digits than its factorization.

1301311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943014 (or 943012 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1301311020 is about 36073.6887495582. The cubic root of 1301311020 is about 1091.7596413118.

Adding to 1301311020 its reverse (201131031), we get a palindrome (1502442051).

The spelling of 1301311020 in words is "one billion, three hundred one million, three hundred eleven thousand, twenty".