21110033331030 has 128 divisors (see below), whose sum is σ = 60240235069440. Its totient is φ = 4632732558720.

The previous prime is 21110033331001. The next prime is 21110033331043. The reversal of 21110033331030 is 3013333001112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21110033330988 and 21110033331006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11939800 + ... + 13593339.

It is an arithmetic number, because the mean of its divisors is an integer number (470626836480).

Almost surely, 2^{21110033331030} is an apocalyptic number.

21110033331030 is an abundant number, since it is smaller than the sum of its proper divisors (39130201738410).

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

21110033331030 is a wasteful number, since it uses less digits than its factorization.

21110033331030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25533314.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21110033331030 its reverse (3013333001112), we get a palindrome (24123366332142).

The spelling of 21110033331030 in words is "twenty-one trillion, one hundred ten billion, thirty-three million, three hundred thirty-one thousand, thirty".