202121946473 has 2 divisors, whose sum is σ = 202121946474. Its totient is φ = 202121946472.

The previous prime is 202121946463. The next prime is 202121946503. The reversal of 202121946473 is 374649121202.

202121946473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175587817024 + 26534129449 = 419032^2 + 162893^2 .

It is a cyclic number.

It is not a de Polignac number, because 202121946473 - 2⁴ = 202121946457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202121946473.

It is not a weakly prime, because it can be changed into another prime (202121946463) 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, 101060973236 + 101060973237.

It is an arithmetic number, because the mean of its divisors is an integer number (101060973237).

Almost surely, 2^202121946473 is an apocalyptic number.

It is an amenable number.

202121946473 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121946473 is an equidigital number, since it uses as much as digits as its factorization.

202121946473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 202121946473 in words is "two hundred two billion, one hundred twenty-one million, nine hundred forty-six thousand, four hundred seventy-three".