210030303421 has 2 divisors, whose sum is σ = 210030303422. Its totient is φ = 210030303420.

The previous prime is 210030303397. The next prime is 210030303433. The reversal of 210030303421 is 124303030012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171333905625 + 38696397796 = 413925^2 + 196714^2 .

It is a cyclic number.

It is not a de Polignac number, because 210030303421 - 2¹¹ = 210030301373 is a prime.

It is a super-2 number, since 2×210030303421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210030303451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105015151710 + 105015151711.

It is an arithmetic number, because the mean of its divisors is an integer number (105015151711).

Almost surely, 2^210030303421 is an apocalyptic number.

It is an amenable number.

210030303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

210030303421 is an equidigital number, since it uses as much as digits as its factorization.

210030303421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 210030303421 its reverse (124303030012), we get a palindrome (334333333433).

The spelling of 210030303421 in words is "two hundred ten billion, thirty million, three hundred three thousand, four hundred twenty-one".