302120202121 has 2 divisors, whose sum is σ = 302120202122. Its totient is φ = 302120202120.

The previous prime is 302120202061. The next prime is 302120202127. The reversal of 302120202121 is 121202021203.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170394758521 + 131725443600 = 412789^2 + 362940^2 .

It is a cyclic number.

It is not a de Polignac number, because 302120202121 - 2¹⁹ = 302119677833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 302120202095 and 302120202104.

It is not a weakly prime, because it can be changed into another prime (302120202127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151060101060 + 151060101061.

It is an arithmetic number, because the mean of its divisors is an integer number (151060101061).

Almost surely, 2^302120202121 is an apocalyptic number.

It is an amenable number.

302120202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

302120202121 is an equidigital number, since it uses as much as digits as its factorization.

302120202121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 302120202121 its reverse (121202021203), we get a palindrome (423322223324).

The spelling of 302120202121 in words is "three hundred two billion, one hundred twenty million, two hundred two thousand, one hundred twenty-one".