210030213421 has 16 divisors (see below), whose sum is σ = 253490997760. Its totient is φ = 169995276720.

The previous prime is 210030213409. The next prime is 210030213427. The reversal of 210030213421 is 124312030012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210030213421 - 2²⁷ = 209895995693 is a prime.

It is a super-2 number, since 2×210030213421² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210030213427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2531115 + ... + 2612776.

It is an arithmetic number, because the mean of its divisors is an integer number (15843187360).

Almost surely, 2^210030213421 is an apocalyptic number.

It is an amenable number.

210030213421 is a deficient number, since it is larger than the sum of its proper divisors (43460784339).

210030213421 is a wasteful number, since it uses less digits than its factorization.

210030213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144224.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 210030213421 its reverse (124312030012), we get a palindrome (334342243433).

The spelling of 210030213421 in words is "two hundred ten billion, thirty million, two hundred thirteen thousand, four hundred twenty-one".