20001222211111 has 8 divisors (see below), whose sum is σ = 20202003360000. Its totient is φ = 19801169851320.

The previous prime is 20001222211099. The next prime is 20001222211123. The reversal of 20001222211111 is 11111222210002.

It is an interprime number because it is at equal distance from previous prime (20001222211099) and next prime (20001222211123).

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 20001222211111 - 2¹³ = 20001222202919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222211151) 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, 182142111 + ... + 182251888.

It is an arithmetic number, because the mean of its divisors is an integer number (2525250420000).

Almost surely, 2^{20001222211111} is an apocalyptic number.

20001222211111 is a deficient number, since it is larger than the sum of its proper divisors (200781148889).

20001222211111 is a wasteful number, since it uses less digits than its factorization.

20001222211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364394549.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20001222211111 its reverse (11111222210002), we get a palindrome (31112444421113).

The spelling of 20001222211111 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred eleven".