2211221121020 has 24 divisors (see below), whose sum is σ = 4845458457504. Its totient is φ = 846032428736.

The previous prime is 2211221121013. The next prime is 2211221121023. The reversal of 2211221121020 is 201211221122.

2211221121020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2211221121020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211221121023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2403500759 + ... + 2403501678.

It is an arithmetic number, because the mean of its divisors is an integer number (201894102396).

Almost surely, 2^{2211221121020} is an apocalyptic number.

2211221121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211221121020 is an abundant number, since it is smaller than the sum of its proper divisors (2634237336484).

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

2211221121020 is a wasteful number, since it uses less digits than its factorization.

2211221121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4807002469 (or 4807002467 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211221121020 its reverse (201211221122), we get a palindrome (2412432342142).

The spelling of 2211221121020 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty".