202121012130321 has 64 divisors (see below), whose sum is σ = 286047103795200. Its totient is φ = 126946637233920.

The previous prime is 202121012130287. The next prime is 202121012130383. The reversal of 202121012130321 is 123031210121202.

It is not a de Polignac number, because 202121012130321 - 2¹⁸ = 202121011868177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202121012110321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3565533640 + ... + 3565590326.

It is an arithmetic number, because the mean of its divisors is an integer number (4469485996800).

Almost surely, 2^{202121012130321} is an apocalyptic number.

It is an amenable number.

202121012130321 is a deficient number, since it is larger than the sum of its proper divisors (83926091664879).

202121012130321 is an equidigital number, since it uses as much as digits as its factorization.

202121012130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57707 (or 57669 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 202121012130321 its reverse (123031210121202), we get a palindrome (325152222251523).

The spelling of 202121012130321 in words is "two hundred two trillion, one hundred twenty-one billion, twelve million, one hundred thirty thousand, three hundred twenty-one".