11211122020020 has 192 divisors, whose sum is σ = 34960900208640. Its totient is φ = 2665699891200.

The previous prime is 11211122020013. The next prime is 11211122020073. The reversal of 11211122020020 is 2002022111211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12652866 + ... + 13509894.

It is an arithmetic number, because the mean of its divisors is an integer number (182088021920).

Almost surely, 2^{11211122020020} is an apocalyptic number.

11211122020020 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 11211122020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17480450104320).

11211122020020 is an abundant number, since it is smaller than the sum of its proper divisors (23749778188620).

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

11211122020020 is a wasteful number, since it uses less digits than its factorization.

11211122020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857626 (or 857624 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11211122020020 its reverse (2002022111211), we get a palindrome (13213144131231).

The spelling of 11211122020020 in words is "eleven trillion, two hundred eleven billion, one hundred twenty-two million, twenty thousand, twenty".