210320101421 has 2 divisors, whose sum is σ = 210320101422. Its totient is φ = 210320101420.

The previous prime is 210320101417. The next prime is 210320101477. The reversal of 210320101421 is 124101023012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178328844100 + 31991257321 = 422290^2 + 178861^2 .

It is a cyclic number.

It is not a de Polignac number, because 210320101421 - 2² = 210320101417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210320101421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210320101921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105160050710 + 105160050711.

It is an arithmetic number, because the mean of its divisors is an integer number (105160050711).

Almost surely, 2^210320101421 is an apocalyptic number.

It is an amenable number.

210320101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

210320101421 is an equidigital number, since it uses as much as digits as its factorization.

210320101421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 210320101421 its reverse (124101023012), we get a palindrome (334421124433).

The spelling of 210320101421 in words is "two hundred ten billion, three hundred twenty million, one hundred one thousand, four hundred twenty-one".