302121020021 has 8 divisors (see below), whose sum is σ = 302303647800. Its totient is φ = 301938442432.

The previous prime is 302121019997. The next prime is 302121020039. The reversal of 302121020021 is 120020121203.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29830125796 + 272290894225 = 172714^2 + 521815^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-302121020021 is a prime.

It is a super-2 number, since 2×302121020021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 302121019978 and 302121020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302121020041) 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, 26154155 + ... + 26165703.

It is an arithmetic number, because the mean of its divisors is an integer number (37787955975).

Almost surely, 2^302121020021 is an apocalyptic number.

It is an amenable number.

302121020021 is a deficient number, since it is larger than the sum of its proper divisors (182627779).

302121020021 is a wasteful number, since it uses less digits than its factorization.

302121020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25095.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 302121020021 its reverse (120020121203), we get a palindrome (422141141224).

The spelling of 302121020021 in words is "three hundred two billion, one hundred twenty-one million, twenty thousand, twenty-one".