1302030021 has 16 divisors (see below), whose sum is σ = 1761948288. Its totient is φ = 855086400.

The previous prime is 1302030013. The next prime is 1302030083. The reversal of 1302030021 is 1200302031.

It is a happy number.

It is not a de Polignac number, because 1302030021 - 2³ = 1302030013 is a prime.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1302029979 and 1302030006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302030011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423831 + ... + 426891.

It is an arithmetic number, because the mean of its divisors is an integer number (110121768).

Almost surely, 2^1302030021 is an apocalyptic number.

It is an amenable number.

1302030021 is a deficient number, since it is larger than the sum of its proper divisors (459918267).

1302030021 is a wasteful number, since it uses less digits than its factorization.

1302030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1302030021 is about 36083.6530994299. The cubic root of 1302030021 is about 1091.9606774808.

Adding to 1302030021 its reverse (1200302031), we get a palindrome (2502332052).

The spelling of 1302030021 in words is "one billion, three hundred two million, thirty thousand, twenty-one".