21030111030 has 16 divisors (see below), whose sum is σ = 50472266544. Its totient is φ = 5608029600.

The previous prime is 21030111013. The next prime is 21030111077. The reversal of 21030111030 is 3011103012.

It is a junction number, because it is equal to n+sod(n) for n = 21030110997 and 21030111015.

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 7 ways as a sum of consecutive naturals, for example, 350501821 + ... + 350501880.

It is an arithmetic number, because the mean of its divisors is an integer number (3154516659).

Almost surely, 2^21030111030 is an apocalyptic number.

21030111030 is an abundant number, since it is smaller than the sum of its proper divisors (29442155514).

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

21030111030 is a wasteful number, since it uses less digits than its factorization.

21030111030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701003711.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21030111030 its reverse (3011103012), we get a palindrome (24041214042).

The spelling of 21030111030 in words is "twenty-one billion, thirty million, one hundred eleven thousand, thirty".