20102122231221 has 16 divisors (see below), whose sum is σ = 26807864307264. Its totient is φ = 13398897748224.

The previous prime is 20102122231189. The next prime is 20102122231273. The reversal of 20102122231221 is 12213222120102.

It is not a de Polignac number, because 20102122231221 - 2⁵ = 20102122231189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102122231721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603342655 + ... + 603375971.

It is an arithmetic number, because the mean of its divisors is an integer number (1675491519204).

Almost surely, 2^{20102122231221} is an apocalyptic number.

It is an amenable number.

20102122231221 is a deficient number, since it is larger than the sum of its proper divisors (6705742076043).

20102122231221 is a wasteful number, since it uses less digits than its factorization.

20102122231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65060.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20102122231221 its reverse (12213222120102), we get a palindrome (32315344351323).

The spelling of 20102122231221 in words is "twenty trillion, one hundred two billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred twenty-one".