22131000222121 has 8 divisors (see below), whose sum is σ = 25292769246144. Its totient is φ = 18969280589040.

The previous prime is 22131000222113. The next prime is 22131000222203. The reversal of 22131000222121 is 12122200013122.

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 22131000222121 - 2³ = 22131000222113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131000252121) 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, 11382535 + ... + 13184236.

It is an arithmetic number, because the mean of its divisors is an integer number (3161596155768).

Almost surely, 2^{22131000222121} is an apocalyptic number.

It is an amenable number.

22131000222121 is a deficient number, since it is larger than the sum of its proper divisors (3161769024023).

22131000222121 is a wasteful number, since it uses less digits than its factorization.

22131000222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24695471.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 22131000222121 its reverse (12122200013122), we get a palindrome (34253200235243).

The spelling of 22131000222121 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred twenty-two thousand, one hundred twenty-one".