12112211021020 has 192 divisors, whose sum is σ = 29476496931840. Its totient is φ = 4134468096000.

The previous prime is 12112211021003. The next prime is 12112211021023. The reversal of 12112211021020 is 2012011221121.

It is a junction number, because it is equal to n+sod(n) for n = 12112211020985 and 12112211021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112211021023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 250554292 + ... + 250602628.

It is an arithmetic number, because the mean of its divisors is an integer number (153523421520).

Almost surely, 2^{12112211021020} is an apocalyptic number.

12112211021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112211021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14738248465920).

12112211021020 is an abundant number, since it is smaller than the sum of its proper divisors (17364285910820).

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

12112211021020 is a wasteful number, since it uses less digits than its factorization.

12112211021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48924 (or 48922 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12112211021020 its reverse (2012011221121), we get a palindrome (14124222242141).

The spelling of 12112211021020 in words is "twelve trillion, one hundred twelve billion, two hundred eleven million, twenty-one thousand, twenty".