21123301030 has 64 divisors (see below), whose sum is σ = 41433960960. Its totient is φ = 7706824704.

The previous prime is 21123301027. The next prime is 21123301099. The reversal of 21123301030 is 3010332112.

It is a junction number, because it is equal to n+sod(n) for n = 21123300995 and 21123301013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13479307 + ... + 13480873.

It is an arithmetic number, because the mean of its divisors is an integer number (647405640).

Almost surely, 2^21123301030 is an apocalyptic number.

21123301030 is a deficient number, since it is larger than the sum of its proper divisors (20310659930).

21123301030 is a wasteful number, since it uses less digits than its factorization.

21123301030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21123301030 its reverse (3010332112), we get a palindrome (24133633142).

The spelling of 21123301030 in words is "twenty-one billion, one hundred twenty-three million, three hundred one thousand, thirty".