21214212705084 has 24 divisors (see below), whose sum is σ = 56571233880448. Its totient is φ = 6061203630000.

The previous prime is 21214212705079. The next prime is 21214212705107. The reversal of 21214212705084 is 48050721241212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 126275075542 + ... + 126275075709.

Almost surely, 2^{21214212705084} is an apocalyptic number.

It is an amenable number.

21214212705084 is an abundant number, since it is smaller than the sum of its proper divisors (35357021175364).

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

21214212705084 is a wasteful number, since it uses less digits than its factorization.

21214212705084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252550151265 (or 252550151263 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

Adding to 21214212705084 its reverse (48050721241212), we get a palindrome (69264933946296).

The spelling of 21214212705084 in words is "twenty-one trillion, two hundred fourteen billion, two hundred twelve million, seven hundred five thousand, eighty-four".