20212211122121 has 8 divisors (see below), whose sum is σ = 20941780089600. Its totient is φ = 19487489789520.

The previous prime is 20212211122111. The next prime is 20212211122219. The reversal of 20212211122121 is 12122111221202.

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 20212211122121 - 2⁴² = 15814164611017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212211122093 and 20212211122102.

It is not an unprimeable number, because it can be changed into a prime (20212211122111) 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 7 ways as a sum of consecutive naturals, for example, 1211900231 + ... + 1211916908.

It is an arithmetic number, because the mean of its divisors is an integer number (2617722511200).

Almost surely, 2^{20212211122121} is an apocalyptic number.

It is an amenable number.

20212211122121 is a deficient number, since it is larger than the sum of its proper divisors (729568967479).

20212211122121 is a wasteful number, since it uses less digits than its factorization.

20212211122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423817439.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20212211122121 its reverse (12122111221202), we get a palindrome (32334322343323).

The spelling of 20212211122121 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".