21210332130 has 96 divisors (see below), whose sum is σ = 62514728640. Its totient is φ = 4946209920.

The previous prime is 21210332113. The next prime is 21210332141. The reversal of 21210332130 is 3123301212.

21210332130 is a `hidden beast` number, since 212 + 103 + 321 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 454836 + ... + 499295.

It is an arithmetic number, because the mean of its divisors is an integer number (651195090).

Almost surely, 2^21210332130 is an apocalyptic number.

21210332130 is an abundant number, since it is smaller than the sum of its proper divisors (41304396510).

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

21210332130 is a wasteful number, since it uses less digits than its factorization.

21210332130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954176 (or 954173 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21210332130 its reverse (3123301212), we get a palindrome (24333633342).

The spelling of 21210332130 in words is "twenty-one billion, two hundred ten million, three hundred thirty-two thousand, one hundred thirty".