210212421361 has 2 divisors, whose sum is σ = 210212421362. Its totient is φ = 210212421360.

The previous prime is 210212421337. The next prime is 210212421373. The reversal of 210212421361 is 163124212012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154886325136 + 55326096225 = 393556^2 + 235215^2 .

It is a cyclic number.

It is not a de Polignac number, because 210212421361 - 2⁵ = 210212421329 is a prime.

It is not a weakly prime, because it can be changed into another prime (210212421301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105106210680 + 105106210681.

It is an arithmetic number, because the mean of its divisors is an integer number (105106210681).

Almost surely, 2^210212421361 is an apocalyptic number.

It is an amenable number.

210212421361 is a deficient number, since it is larger than the sum of its proper divisors (1).

210212421361 is an equidigital number, since it uses as much as digits as its factorization.

210212421361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 210212421361 its reverse (163124212012), we get a palindrome (373336633373).

The spelling of 210212421361 in words is "two hundred ten billion, two hundred twelve million, four hundred twenty-one thousand, three hundred sixty-one".