2123011223220 has 96 divisors (see below), whose sum is σ = 5998323663360. Its totient is φ = 561005885440.

The previous prime is 2123011223209. The next prime is 2123011223237. The reversal of 2123011223220 is 223221103212.

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 31 ways as a sum of consecutive naturals, for example, 34133350 + ... + 34195490.

It is an arithmetic number, because the mean of its divisors is an integer number (62482538160).

Almost surely, 2^{2123011223220} is an apocalyptic number.

2123011223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123011223220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2999161831680).

2123011223220 is an abundant number, since it is smaller than the sum of its proper divisors (3875312440140).

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

2123011223220 is a wasteful number, since it uses less digits than its factorization.

2123011223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67305 (or 67303 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2123011223220 its reverse (223221103212), we get a palindrome (2346232326432).

The spelling of 2123011223220 in words is "two trillion, one hundred twenty-three billion, eleven million, two hundred twenty-three thousand, two hundred twenty".