20112122202111 has 16 divisors (see below), whose sum is σ = 29951735224320. Its totient is φ = 13337882085240.

The previous prime is 20112122202059. The next prime is 20112122202121. The reversal of 20112122202111 is 11120222121102.

20112122202111 is a `hidden beast` number, since 20 + 1 + 1 + 212 + 220 + 211 + 1 = 666.

It is not a de Polignac number, because 20112122202111 - 2²³ = 20112113813503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112122202121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949977605 + ... + 1949987918.

It is an arithmetic number, because the mean of its divisors is an integer number (1871983451520).

Almost surely, 2^{20112122202111} is an apocalyptic number.

20112122202111 is a deficient number, since it is larger than the sum of its proper divisors (9839613022209).

20112122202111 is a wasteful number, since it uses less digits than its factorization.

20112122202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3899965723 (or 3899965717 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20112122202111 its reverse (11120222121102), we get a palindrome (31232344323213).

The spelling of 20112122202111 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-two million, two hundred two thousand, one hundred eleven".