20112120111020 has 24 divisors (see below), whose sum is σ = 48269088266784. Its totient is φ = 6895584038016.

The previous prime is 20112120111001. The next prime is 20112120111091. The reversal of 20112120111020 is 2011102121102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20112120110986 and 20112120111004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71829000257 + ... + 71829000536.

It is an arithmetic number, because the mean of its divisors is an integer number (2011212011116).

Almost surely, 2^{20112120111020} is an apocalyptic number.

20112120111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112120111020 is an abundant number, since it is smaller than the sum of its proper divisors (28156968155764).

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

20112120111020 is a wasteful number, since it uses less digits than its factorization.

20112120111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143658000809 (or 143658000807 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20112120111020 its reverse (2011102121102), we get a palindrome (22123222232122).

The spelling of 20112120111020 in words is "twenty trillion, one hundred twelve billion, one hundred twenty million, one hundred eleven thousand, twenty".