21220412214 has 128 divisors (see below), whose sum is σ = 47582650368. Its totient is φ = 6274920960.

The previous prime is 21220412183. The next prime is 21220412221. The reversal of 21220412214 is 41221402212.

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 63 ways as a sum of consecutive naturals, for example, 80685847 + ... + 80686109.

It is an arithmetic number, because the mean of its divisors is an integer number (371739456).

Almost surely, 2^21220412214 is an apocalyptic number.

21220412214 is an abundant number, since it is smaller than the sum of its proper divisors (26362238154).

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

21220412214 is a wasteful number, since it uses less digits than its factorization.

21220412214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21220412214 its reverse (41221402212), we get a palindrome (62441814426).

The spelling of 21220412214 in words is "twenty-one billion, two hundred twenty million, four hundred twelve thousand, two hundred fourteen".