10011222222121 has 4 divisors (see below), whose sum is σ = 10022115827200. Its totient is φ = 10000328617044.

The previous prime is 10011222222109. The next prime is 10011222222139. The reversal of 10011222222121 is 12122222211001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10011222222121 - 2¹¹ = 10011222220073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10011222229121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5446801161 + ... + 5446802998.

It is an arithmetic number, because the mean of its divisors is an integer number (2505528956800).

Almost surely, 2^{10011222222121} is an apocalyptic number.

It is an amenable number.

10011222222121 is a deficient number, since it is larger than the sum of its proper divisors (10893605079).

10011222222121 is an equidigital number, since it uses as much as digits as its factorization.

10011222222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10893605078.

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

Adding to 10011222222121 its reverse (12122222211001), we get a palindrome (22133444433122).

The spelling of 10011222222121 in words is "ten trillion, eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".