20011112202123 has 12 divisors (see below), whose sum is σ = 33034216968688. Its totient is φ = 11434921258320.

The previous prime is 20011112202097. The next prime is 20011112202187. The reversal of 20011112202123 is 32120221111002.

It is not a de Polignac number, because 20011112202123 - 2⁹ = 20011112201611 is a prime.

It is a super-2 number, since 2×20011112202123² (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 = 20011112202096 and 20011112202105.

It is not an unprimeable number, because it can be changed into a prime (20011112202923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158818350748 + ... + 158818350873.

Almost surely, 2^{20011112202123} is an apocalyptic number.

20011112202123 is a deficient number, since it is larger than the sum of its proper divisors (13023104766565).

20011112202123 is a wasteful number, since it uses less digits than its factorization.

20011112202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317636701634 (or 317636701631 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20011112202123 its reverse (32120221111002), we get a palindrome (52131333313125).

The spelling of 20011112202123 in words is "twenty trillion, eleven billion, one hundred twelve million, two hundred two thousand, one hundred twenty-three".