11211001200020 has 24 divisors (see below), whose sum is σ = 24090616533984. Its totient is φ = 4380112096416.

The previous prime is 11211001199989. The next prime is 11211001200043. The reversal of 11211001200020 is 2000210011211.

It is a junction number, because it is equal to n+sod(n) for n = 11211001199974 and 11211001200010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6518023094 + ... + 6518024813.

It is an arithmetic number, because the mean of its divisors is an integer number (1003775688916).

Almost surely, 2^{11211001200020} is an apocalyptic number.

11211001200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211001200020 is an abundant number, since it is smaller than the sum of its proper divisors (12879615333964).

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

11211001200020 is a wasteful number, since it uses less digits than its factorization.

11211001200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13036047959 (or 13036047957 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11211001200020 its reverse (2000210011211), we get a palindrome (13211211211231).

The spelling of 11211001200020 in words is "eleven trillion, two hundred eleven billion, one million, two hundred thousand, twenty".