20122122101221 has 32 divisors (see below), whose sum is σ = 24279783840000. Its totient is φ = 16290698434560.

The previous prime is 20122122101201. The next prime is 20122122101261. The reversal of 20122122101221 is 12210122122102.

It is a cyclic number.

It is not a de Polignac number, because 20122122101221 - 2⁵ = 20122122101189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122122101201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301426155 + ... + 301492903.

It is an arithmetic number, because the mean of its divisors is an integer number (758743245000).

Almost surely, 2^{20122122101221} is an apocalyptic number.

It is an amenable number.

20122122101221 is a deficient number, since it is larger than the sum of its proper divisors (4157661738779).

20122122101221 is a wasteful number, since it uses less digits than its factorization.

20122122101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73549.

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

Adding to 20122122101221 its reverse (12210122122102), we get a palindrome (32332244223323).

The spelling of 20122122101221 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred one thousand, two hundred twenty-one".