20110110012 has 18 divisors (see below), whose sum is σ = 50833889288. Its totient is φ = 6703369992.

The previous prime is 20110109983. The next prime is 20110110043. The reversal of 20110110012 is 21001101102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20110109976 and 20110110003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279307048 + ... + 279307119.

Almost surely, 2^20110110012 is an apocalyptic number.

It is an amenable number.

20110110012 is an abundant number, since it is smaller than the sum of its proper divisors (30723779276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110110012 is a wasteful number, since it uses less digits than its factorization.

20110110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558614177 (or 558614172 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20110110012 its reverse (21001101102), we get a palindrome (41111211114).

The spelling of 20110110012 in words is "twenty billion, one hundred ten million, one hundred ten thousand, twelve".