11211111002020 has 48 divisors (see below), whose sum is σ = 23585471078400. Its totient is φ = 4476424371840.

The previous prime is 11211111002017. The next prime is 11211111002123. The reversal of 11211111002020 is 2020011111211.

It is a happy number.

It is a super-2 number, since 2×11211111002020² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28688701 + ... + 29076859.

It is an arithmetic number, because the mean of its divisors is an integer number (491363980800).

Almost surely, 2^{11211111002020} is an apocalyptic number.

11211111002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211111002020 is an abundant number, since it is smaller than the sum of its proper divisors (12374360076380).

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

11211111002020 is a wasteful number, since it uses less digits than its factorization.

11211111002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390748 (or 390746 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11211111002020 its reverse (2020011111211), we get a palindrome (13231122113231).

The spelling of 11211111002020 in words is "eleven trillion, two hundred eleven billion, one hundred eleven million, two thousand, twenty".