202142214221 has 2 divisors, whose sum is σ = 202142214222. Its totient is φ = 202142214220.

The previous prime is 202142214193. The next prime is 202142214223. The reversal of 202142214221 is 122412241202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195528458596 + 6613755625 = 442186^2 + 81325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202142214221 is a prime.

It is a super-2 number, since 2×202142214221² (a number of 23 digits) contains 22 as substring.

Together with 202142214223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202142214223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101071107110 + 101071107111.

It is an arithmetic number, because the mean of its divisors is an integer number (101071107111).

Almost surely, 2^202142214221 is an apocalyptic number.

It is an amenable number.

202142214221 is a deficient number, since it is larger than the sum of its proper divisors (1).

202142214221 is an equidigital number, since it uses as much as digits as its factorization.

202142214221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 202142214221 its reverse (122412241202), we get a palindrome (324554455423).

The spelling of 202142214221 in words is "two hundred two billion, one hundred forty-two million, two hundred fourteen thousand, two hundred twenty-one".