22011222212121 has 8 divisors (see below), whose sum is σ = 29348317953280. Its totient is φ = 14674137306192.

The previous prime is 22011222212117. The next prime is 22011222212129. The reversal of 22011222212121 is 12121222211022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22011222212121 - 2² = 22011222212117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22011222212129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6689496 + ... + 9421878.

It is an arithmetic number, because the mean of its divisors is an integer number (3668539744160).

Almost surely, 2^{22011222212121} is an apocalyptic number.

It is an amenable number.

22011222212121 is a deficient number, since it is larger than the sum of its proper divisors (7337095741159).

22011222212121 is a wasteful number, since it uses less digits than its factorization.

22011222212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5417615.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22011222212121 its reverse (12121222211022), we get a palindrome (34132444423143).

The spelling of 22011222212121 in words is "twenty-two trillion, eleven billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".