1300011220 has 12 divisors (see below), whose sum is σ = 2730023604. Its totient is φ = 520004480.

The previous prime is 1300011191. The next prime is 1300011239. The reversal of 1300011220 is 221100031.

It can be written as a sum of positive squares in 2 ways, for example, as 407555344 + 892455876 = 20188^2 + 29874^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1300011197 and 1300011206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32500261 + ... + 32500300.

It is an arithmetic number, because the mean of its divisors is an integer number (227501967).

Almost surely, 2^1300011220 is an apocalyptic number.

1300011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300011220 is an abundant number, since it is smaller than the sum of its proper divisors (1430012384).

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

1300011220 is a wasteful number, since it uses less digits than its factorization.

1300011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65000570 (or 65000568 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1300011220 is about 36055.6683477092. The cubic root of 1300011220 is about 1091.3960229054.

Adding to 1300011220 its reverse (221100031), we get a palindrome (1521111251).

The spelling of 1300011220 in words is "one billion, three hundred million, eleven thousand, two hundred twenty".