302020212421 has 4 divisors (see below), whose sum is σ = 302148352332. Its totient is φ = 301892072512.

The previous prime is 302020212401. The next prime is 302020212451. The reversal of 302020212421 is 124212020203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124212020203 = 8233 ⋅15087091.

It can be written as a sum of positive squares in 2 ways, for example, as 66226449025 + 235793763396 = 257345^2 + 485586^2 .

It is a cyclic number.

It is not a de Polignac number, because 302020212421 - 2¹⁵ = 302020179653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302020212401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64066420 + ... + 64071133.

It is an arithmetic number, because the mean of its divisors is an integer number (75537088083).

Almost surely, 2^302020212421 is an apocalyptic number.

It is an amenable number.

302020212421 is a deficient number, since it is larger than the sum of its proper divisors (128139911).

302020212421 is a wasteful number, since it uses less digits than its factorization.

302020212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128139910.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 302020212421 its reverse (124212020203), we get a palindrome (426232232624).

The spelling of 302020212421 in words is "three hundred two billion, twenty million, two hundred twelve thousand, four hundred twenty-one".