1300021011 has 24 divisors (see below), whose sum is σ = 1955014880. Its totient is φ = 831689856.

The previous prime is 1300021001. The next prime is 1300021013. The reversal of 1300021011 is 1101200031.

It is not a de Polignac number, because 1300021011 - 2⁶ = 1300020947 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1300020984 and 1300021002.

It is not an unprimeable number, because it can be changed into a prime (1300021013) 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 23 ways as a sum of consecutive naturals, for example, 2431 + ... + 51048.

Almost surely, 2^1300021011 is an apocalyptic number.

1300021011 is a deficient number, since it is larger than the sum of its proper divisors (654993869).

1300021011 is a wasteful number, since it uses less digits than its factorization.

1300021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53595 (or 53592 counting only the distinct ones).

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

The square root of 1300021011 is about 36055.8041236082. The cubic root of 1300021011 is about 1091.3987628386.

Adding to 1300021011 its reverse (1101200031), we get a palindrome (2401221042).

The spelling of 1300021011 in words is "one billion, three hundred million, twenty-one thousand, eleven".