2123331221000 has 128 divisors (see below), whose sum is σ = 5434827615360. Its totient is φ = 770048928000.

The previous prime is 2123331220999. The next prime is 2123331221021. The reversal of 2123331221000 is 1221333212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3844247 + ... + 4361753.

It is an arithmetic number, because the mean of its divisors is an integer number (42459590745).

Almost surely, 2^{2123331221000} is an apocalyptic number.

2123331221000 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 2123331221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2717413807680).

2123331221000 is an abundant number, since it is smaller than the sum of its proper divisors (3311496394360).

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

2123331221000 is a wasteful number, since it uses less digits than its factorization.

2123331221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517912 (or 517898 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2123331221000 its reverse (1221333212), we get a palindrome (2124552554212).

The spelling of 2123331221000 in words is "two trillion, one hundred twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand".