202212012521 has 2 divisors, whose sum is σ = 202212012522. Its totient is φ = 202212012520.

The previous prime is 202212012511. The next prime is 202212012529. The reversal of 202212012521 is 125210212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128138225296 + 74073787225 = 357964^2 + 272165^2 .

It is a cyclic number.

It is not a de Polignac number, because 202212012521 - 2²⁶ = 202144903657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202212012493 and 202212012502.

It is not a weakly prime, because it can be changed into another prime (202212012529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101106006260 + 101106006261.

It is an arithmetic number, because the mean of its divisors is an integer number (101106006261).

Almost surely, 2^202212012521 is an apocalyptic number.

It is an amenable number.

202212012521 is a deficient number, since it is larger than the sum of its proper divisors (1).

202212012521 is an equidigital number, since it uses as much as digits as its factorization.

202212012521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 202212012521 its reverse (125210212202), we get a palindrome (327422224723).

The spelling of 202212012521 in words is "two hundred two billion, two hundred twelve million, twelve thousand, five hundred twenty-one".