12111021210020 has 24 divisors (see below), whose sum is σ = 26053465141368. Its totient is φ = 4726252179200.

The previous prime is 12111021210007. The next prime is 12111021210049. The reversal of 12111021210020 is 2001212011121.

12111021210020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1405927175524 + 10705094034496 = 1185718^2 + 3271864^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12111021209977 and 12111021210004.

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, 7384768211 + ... + 7384769850.

It is an arithmetic number, because the mean of its divisors is an integer number (1085561047557).

Almost surely, 2^{12111021210020} is an apocalyptic number.

12111021210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111021210020 is an abundant number, since it is smaller than the sum of its proper divisors (13942443931348).

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

12111021210020 is a wasteful number, since it uses less digits than its factorization.

12111021210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14769538111 (or 14769538109 counting only the distinct ones).

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

Adding to 12111021210020 its reverse (2001212011121), we get a palindrome (14112233221141).

The spelling of 12111021210020 in words is "twelve trillion, one hundred eleven billion, twenty-one million, two hundred ten thousand, twenty".