20011022101111 has 8 divisors (see below), whose sum is σ = 20025524440064. Its totient is φ = 19996522471800.

The previous prime is 20011022101097. The next prime is 20011022101121. The reversal of 20011022101111 is 11110122011002.

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 20011022101111 - 2⁷ = 20011022100983 is a prime.

It is a super-2 number, since 2×20011022101111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011022101091 and 20011022101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011022101121) 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, 14216656 + ... + 15560698.

It is an arithmetic number, because the mean of its divisors is an integer number (2503190555008).

Almost surely, 2^{20011022101111} is an apocalyptic number.

20011022101111 is a deficient number, since it is larger than the sum of its proper divisors (14502338953).

20011022101111 is a wasteful number, since it uses less digits than its factorization.

20011022101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354821.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20011022101111 its reverse (11110122011002), we get a palindrome (31121144112113).

The spelling of 20011022101111 in words is "twenty trillion, eleven billion, twenty-two million, one hundred one thousand, one hundred eleven".