11211221012020 has 48 divisors (see below), whose sum is σ = 23591073356928. Its totient is φ = 4475442142080.

The previous prime is 11211221011993. The next prime is 11211221012059. The reversal of 11211221012020 is 2021012211211.

It is a junction number, because it is equal to n+sod(n) for n = 11211221011985 and 11211221012003.

It is a congruent number.

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, 59320794 + ... + 59509486.

It is an arithmetic number, because the mean of its divisors is an integer number (491480694936).

Almost surely, 2^{11211221012020} is an apocalyptic number.

11211221012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211221012020 is an abundant number, since it is smaller than the sum of its proper divisors (12379852344908).

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

11211221012020 is a wasteful number, since it uses less digits than its factorization.

11211221012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194680 (or 194678 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11211221012020 its reverse (2021012211211), we get a palindrome (13232233223231).

The spelling of 11211221012020 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, twelve thousand, twenty".