20122101212221 has 8 divisors (see below), whose sum is σ = 20463404189760. Its totient is φ = 19780806581952.

The previous prime is 20122101212197. The next prime is 20122101212237. The reversal of 20122101212221 is 12221210122102.

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 20122101212221 - 2¹⁷ = 20122101081149 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 (20122101212251) 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, 2874501 + ... + 6964693.

It is an arithmetic number, because the mean of its divisors is an integer number (2557925523720).

Almost surely, 2^{20122101212221} is an apocalyptic number.

It is an amenable number.

20122101212221 is a deficient number, since it is larger than the sum of its proper divisors (341302977539).

20122101212221 is an equidigital number, since it uses as much as digits as its factorization.

20122101212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173635.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20122101212221 its reverse (12221210122102), we get a palindrome (32343311334323).

The spelling of 20122101212221 in words is "twenty trillion, one hundred twenty-two billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".