210221213233403 has 2 divisors, whose sum is σ = 210221213233404. Its totient is φ = 210221213233402.

The previous prime is 210221213233223. The next prime is 210221213233429. The reversal of 210221213233403 is 304332312122012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210221213233403 is a prime.

It is a super-2 number, since 2×210221213233403² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (210221213233453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110606616701 + 105110606616702.

It is an arithmetic number, because the mean of its divisors is an integer number (105110606616702).

Almost surely, 2^{210221213233403} is an apocalyptic number.

210221213233403 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221213233403 is an equidigital number, since it uses as much as digits as its factorization.

210221213233403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 210221213233403 its reverse (304332312122012), we get a palindrome (514553525355415).

The spelling of 210221213233403 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred thirteen million, two hundred thirty-three thousand, four hundred three".