202312120321 has 2 divisors, whose sum is σ = 202312120322. Its totient is φ = 202312120320.

The previous prime is 202312120313. The next prime is 202312120331. The reversal of 202312120321 is 123021213202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202175230321 + 136890000 = 449639^2 + 11700^2 .

It is a cyclic number.

It is not a de Polignac number, because 202312120321 - 2³ = 202312120313 is a prime.

It is a super-2 number, since 2×202312120321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202312120331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101156060160 + 101156060161.

It is an arithmetic number, because the mean of its divisors is an integer number (101156060161).

Almost surely, 2^202312120321 is an apocalyptic number.

It is an amenable number.

202312120321 is a deficient number, since it is larger than the sum of its proper divisors (1).

202312120321 is an equidigital number, since it uses as much as digits as its factorization.

202312120321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 202312120321 its reverse (123021213202), we get a palindrome (325333333523).

The spelling of 202312120321 in words is "two hundred two billion, three hundred twelve million, one hundred twenty thousand, three hundred twenty-one".