1302020021 has 8 divisors (see below), whose sum is σ = 1385146944. Its totient is φ = 1219619520.

The previous prime is 1302019967. The next prime is 1302020029. The reversal of 1302020021 is 1200202031.

It is a happy number.

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 1302020021 - 2¹⁰ = 1302018997 is a prime.

It is a super-2 number, since 2×1302020021² = 3390512270169680882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1302019984 and 1302020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302020029) 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, 177905 + ... + 185078.

It is an arithmetic number, because the mean of its divisors is an integer number (173143368).

Almost surely, 2^1302020021 is an apocalyptic number.

It is an amenable number.

1302020021 is a deficient number, since it is larger than the sum of its proper divisors (83126923).

1302020021 is a wasteful number, since it uses less digits than its factorization.

1302020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363211.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1302020021 is about 36083.5145322625. The cubic root of 1302020021 is about 1091.9578819399.

Adding to 1302020021 its reverse (1200202031), we get a palindrome (2502222052).

The spelling of 1302020021 in words is "one billion, three hundred two million, twenty thousand, twenty-one".