1300011021 has 12 divisors (see below), whose sum is σ = 1928545372. Its totient is φ = 843250176.

The previous prime is 1300011019. The next prime is 1300011049. The reversal of 1300011021 is 1201100031.

It can be written as a sum of positive squares in 2 ways, for example, as 841580100 + 458430921 = 29010^2 + 21411^2 .

It is not a de Polignac number, because 1300011021 - 2¹ = 1300011019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1300010994 and 1300011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300011121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1951636 + ... + 1952301.

Almost surely, 2^1300011021 is an apocalyptic number.

It is an amenable number.

1300011021 is a deficient number, since it is larger than the sum of its proper divisors (628534351).

1300011021 is a wasteful number, since it uses less digits than its factorization.

1300011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903980 (or 3903977 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1300011021 is about 36055.6655880875. The cubic root of 1300011021 is about 1091.3959672167.

Adding to 1300011021 its reverse (1201100031), we get a palindrome (2501111052).

The spelling of 1300011021 in words is "one billion, three hundred million, eleven thousand, twenty-one".