21230100312 has 32 divisors (see below), whose sum is σ = 53109388800. Its totient is φ = 7072148384.

The previous prime is 21230100301. The next prime is 21230100373. The reversal of 21230100312 is 21300103212.

It is a junction number, because it is equal to n+sod(n) for n = 21230100291 and 21230100300.

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, 246288 + ... + 321119.

It is an arithmetic number, because the mean of its divisors is an integer number (1659668400).

Almost surely, 2^21230100312 is an apocalyptic number.

It is an amenable number.

21230100312 is an abundant number, since it is smaller than the sum of its proper divisors (31879288488).

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

21230100312 is a wasteful number, since it uses less digits than its factorization.

21230100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568975 (or 568971 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21230100312 its reverse (21300103212), we get a palindrome (42530203524).

The spelling of 21230100312 in words is "twenty-one billion, two hundred thirty million, one hundred thousand, three hundred twelve".