21222012200221 has 8 divisors (see below), whose sum is σ = 24817768420544. Its totient is φ = 17767266027840.

The previous prime is 21222012200119. The next prime is 21222012200239. The reversal of 21222012200221 is 12200221022212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21222012200221 - 2²⁹ = 21221475329309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222012200251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35252511660 + ... + 35252512261.

It is an arithmetic number, because the mean of its divisors is an integer number (3102221052568).

Almost surely, 2^{21222012200221} is an apocalyptic number.

It is an amenable number.

21222012200221 is a deficient number, since it is larger than the sum of its proper divisors (3595756220323).

21222012200221 is an equidigital number, since it uses as much as digits as its factorization.

21222012200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70505023971.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222012200221 its reverse (12200221022212), we get a palindrome (33422233222433).

The spelling of 21222012200221 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, two hundred thousand, two hundred twenty-one".