11211221222020 has 48 divisors (see below), whose sum is σ = 23642800263936. Its totient is φ = 4465607328000.

The previous prime is 11211221221987. The next prime is 11211221222101. The reversal of 11211221222020 is 2022212211211.

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, 7952725 + ... + 9255715.

It is an arithmetic number, because the mean of its divisors is an integer number (492558338832).

Almost surely, 2^{11211221222020} is an apocalyptic number.

11211221222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211221222020 is an abundant number, since it is smaller than the sum of its proper divisors (12431579041916).

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

11211221222020 is a wasteful number, since it uses less digits than its factorization.

11211221222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304812 (or 1304810 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11211221222020 its reverse (2022212211211), we get a palindrome (13233433433231).

The spelling of 11211221222020 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty".