12211011312020 has 72 divisors (see below), whose sum is σ = 27210474512424. Its totient is φ = 4587130318848.

The previous prime is 12211011312001. The next prime is 12211011312121. The reversal of 12211011312020 is 2021311011221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6565084066564 + 5645927245456 = 2562242^2 + 2376116^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 12211011312020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72801692 + ... + 72969228.

It is an arithmetic number, because the mean of its divisors is an integer number (377923257117).

Almost surely, 2^{12211011312020} is an apocalyptic number.

12211011312020 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 12211011312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13605237256212).

12211011312020 is an abundant number, since it is smaller than the sum of its proper divisors (14999463200404).

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

12211011312020 is a wasteful number, since it uses less digits than its factorization.

12211011312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168489 (or 168024 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12211011312020 its reverse (2021311011221), we get a palindrome (14232322323241).

The spelling of 12211011312020 in words is "twelve trillion, two hundred eleven billion, eleven million, three hundred twelve thousand, twenty".