22221000021121 has 8 divisors (see below), whose sum is σ = 24241172133600. Its totient is φ = 20200841442240.

The previous prime is 22221000021097. The next prime is 22221000021127. The reversal of 22221000021121 is 12112000012222.

It is a happy number.

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 22221000021121 - 2⁵ = 22221000021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221000021095 and 22221000021104.

It is not an unprimeable number, because it can be changed into a prime (22221000021127) 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, 216210 + ... + 6669988.

It is an arithmetic number, because the mean of its divisors is an integer number (3030146516700).

Almost surely, 2^{22221000021121} is an apocalyptic number.

It is an amenable number.

22221000021121 is a deficient number, since it is larger than the sum of its proper divisors (2020172112479).

22221000021121 is a wasteful number, since it uses less digits than its factorization.

22221000021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6766799.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221000021121 its reverse (12112000012222), we get a palindrome (34333000033343).

The spelling of 22221000021121 in words is "twenty-two trillion, two hundred twenty-one billion, twenty-one thousand, one hundred twenty-one".