21214230100 has 72 divisors (see below), whose sum is σ = 53396651840. Its totient is φ = 7164875520.

The previous prime is 21214229989. The next prime is 21214230137. The reversal of 21214230100 is 103241212.

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 23 ways as a sum of consecutive naturals, for example, 179265 + ... + 273064.

Almost surely, 2^21214230100 is an apocalyptic number.

21214230100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214230100 is an abundant number, since it is smaller than the sum of its proper divisors (32182421740).

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

21214230100 is a wasteful number, since it uses less digits than its factorization.

21214230100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452417 (or 452410 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21214230100 its reverse (103241212), we get a palindrome (21317471312).

It can be divided in two parts, 212142 and 30100, that added together give a palindrome (242242).

The spelling of 21214230100 in words is "twenty-one billion, two hundred fourteen million, two hundred thirty thousand, one hundred".