21210310030 has 96 divisors (see below), whose sum is σ = 48322564416. Its totient is φ = 6643316736.

The previous prime is 21210310027. The next prime is 21210310057. The reversal of 21210310030 is 3001301212.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 600727 + ... + 635053.

It is an arithmetic number, because the mean of its divisors is an integer number (503360046).

Almost surely, 2^21210310030 is an apocalyptic number.

21210310030 is an abundant number, since it is smaller than the sum of its proper divisors (27112254386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210310030 is a wasteful number, since it uses less digits than its factorization.

21210310030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34458 (or 34451 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21210310030 its reverse (3001301212), we get a palindrome (24211611242).

The spelling of 21210310030 in words is "twenty-one billion, two hundred ten million, three hundred ten thousand, thirty".