11212211212020 has 1296 divisors, whose sum is σ = 46188497064528. Its totient is φ = 2180275937280.

The previous prime is 11212211212019. The next prime is 11212211212031. The reversal of 11212211212020 is 2021211221211.

11212211212020 is a `hidden beast` number, since 1 + 121 + 221 + 121 + 202 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1890498502116 + 9321712709904 = 1374954^2 + 3053148^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11212211211984 and 11212211212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 1531509960 + ... + 1531517280.

Almost surely, 2^{11212211212020} is an apocalyptic number.

11212211212020 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 11212211212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23094248532264).

11212211212020 is an abundant number, since it is smaller than the sum of its proper divisors (34976285852508).

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

11212211212020 is a wasteful number, since it uses less digits than its factorization.

11212211212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438 (or 7407 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11212211212020 its reverse (2021211221211), we get a palindrome (13233422433231).

The spelling of 11212211212020 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, two hundred twelve thousand, twenty".