21214210106236 has 48 divisors (see below), whose sum is σ = 43232653449216. Its totient is φ = 8919497980224.

The previous prime is 21214210106233. The next prime is 21214210106237. The reversal of 21214210106236 is 63260101241212.

It is a junction number, because it is equal to n+sod(n) for n = 21214210106198 and 21214210106207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214210106233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16916215 + ... + 18126961.

It is an arithmetic number, because the mean of its divisors is an integer number (900680280192).

Almost surely, 2^{21214210106236} is an apocalyptic number.

It is an amenable number.

21214210106236 is an abundant number, since it is smaller than the sum of its proper divisors (22018443342980).

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

21214210106236 is a wasteful number, since it uses less digits than its factorization.

21214210106236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222618 (or 1222616 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 21214210106236 its reverse (63260101241212), we get a palindrome (84474311347448).

The spelling of 21214210106236 in words is "twenty-one trillion, two hundred fourteen billion, two hundred ten million, one hundred six thousand, two hundred thirty-six".