202428722021 has 2 divisors, whose sum is σ = 202428722022. Its totient is φ = 202428722020.

The previous prime is 202428721993. The next prime is 202428722039. The reversal of 202428722021 is 120227824202.

202428722021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126575850625 + 75852871396 = 355775^2 + 275414^2 .

It is a cyclic number.

It is not a de Polignac number, because 202428722021 - 2¹⁴ = 202428705637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202428721021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101214361010 + 101214361011.

It is an arithmetic number, because the mean of its divisors is an integer number (101214361011).

Almost surely, 2^202428722021 is an apocalyptic number.

It is an amenable number.

202428722021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202428722021 is an equidigital number, since it uses as much as digits as its factorization.

202428722021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 32.

The spelling of 202428722021 in words is "two hundred two billion, four hundred twenty-eight million, seven hundred twenty-two thousand, twenty-one".