21222022101221 has 8 divisors (see below), whose sum is σ = 21225322003200. Its totient is φ = 21218722415280.

The previous prime is 21222022101197. The next prime is 21222022101223. The reversal of 21222022101221 is 12210122022212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222022101221 - 2⁴² = 16823975590117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222022101193 and 21222022101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222022101223) 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, 384227435 + ... + 384282663.

It is an arithmetic number, because the mean of its divisors is an integer number (2653165250400).

Almost surely, 2^{21222022101221} is an apocalyptic number.

It is an amenable number.

21222022101221 is a deficient number, since it is larger than the sum of its proper divisors (3299901979).

21222022101221 is an equidigital number, since it uses as much as digits as its factorization.

21222022101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108019.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222022101221 its reverse (12210122022212), we get a palindrome (33432144123433).

The spelling of 21222022101221 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred one thousand, two hundred twenty-one".