1302130021 has 8 divisors (see below), whose sum is σ = 1373420000. Its totient is φ = 1231115760.

The previous prime is 1302130003. The next prime is 1302130031. The reversal of 1302130021 is 1200312031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1302130021 - 2⁹ = 1302129509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1302129983 and 1302130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302130001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59190 + ... + 78151.

It is an arithmetic number, because the mean of its divisors is an integer number (171677500).

Almost surely, 2^1302130021 is an apocalyptic number.

It is an amenable number.

1302130021 is a deficient number, since it is larger than the sum of its proper divisors (71289979).

1302130021 is a wasteful number, since it uses less digits than its factorization.

1302130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137859.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1302130021 is about 36085.0387418387. The cubic root of 1302130021 is about 1091.9886321031.

Adding to 1302130021 its reverse (1200312031), we get a palindrome (2502442052).

The spelling of 1302130021 in words is "one billion, three hundred two million, one hundred thirty thousand, twenty-one".