1300212021 has 4 divisors (see below), whose sum is σ = 1733616032. Its totient is φ = 866808012.

The previous prime is 1300212007. The next prime is 1300212041. The reversal of 1300212021 is 1202120031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1300212021 - 2⁵ = 1300211989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1300211988 and 1300212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300212041) 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 3 ways as a sum of consecutive naturals, for example, 216702001 + ... + 216702006.

It is an arithmetic number, because the mean of its divisors is an integer number (433404008).

Almost surely, 2^1300212021 is an apocalyptic number.

It is an amenable number.

1300212021 is a deficient number, since it is larger than the sum of its proper divisors (433404011).

1300212021 is an equidigital number, since it uses as much as digits as its factorization.

1300212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433404010.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1300212021 is about 36058.4528370256. The cubic root of 1300212021 is about 1091.4522127103.

Adding to 1300212021 its reverse (1202120031), we get a palindrome (2502332052).

The spelling of 1300212021 in words is "one billion, three hundred million, two hundred twelve thousand, twenty-one".