21211012320030 has 80 divisors (see below), whose sum is σ = 61421290406784. Its totient is φ = 5221172260800.

The previous prime is 21211012320007. The next prime is 21211012320079. The reversal of 21211012320030 is 3002321011212.

21211012320030 is a `hidden beast` number, since 212 + 1 + 101 + 2 + 320 + 0 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21211012319985 and 21211012320012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1007160046 + ... + 1007181105.

Almost surely, 2^{21211012320030} is an apocalyptic number.

21211012320030 is an abundant number, since it is smaller than the sum of its proper divisors (40210278086754).

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

21211012320030 is a wasteful number, since it uses less digits than its factorization.

21211012320030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014341183 (or 2014341174 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21211012320030 its reverse (3002321011212), we get a palindrome (24213333331242).

The spelling of 21211012320030 in words is "twenty-one trillion, two hundred eleven billion, twelve million, three hundred twenty thousand, thirty".