7890221121000 has 64 divisors (see below), whose sum is σ = 24617489906880. Its totient is φ = 2104058964800.

The previous prime is 7890221120923. The next prime is 7890221121001. The reversal of 7890221121000 is 1211220987.

It is not an unprimeable number, because it can be changed into a prime (7890221121001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315033854 + ... + 1315039853.

It is an arithmetic number, because the mean of its divisors is an integer number (384648279795).

Almost surely, 2^{7890221121000} is an apocalyptic number.

It is an amenable number.

7890221121000 is an abundant number, since it is smaller than the sum of its proper divisors (16727268785880).

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

7890221121000 is a wasteful number, since it uses less digits than its factorization.

7890221121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630073731 (or 2630073717 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

Adding to 7890221121000 its reverse (1211220987), we get a palindrome (7891432341987).

The spelling of 7890221121000 in words is "seven trillion, eight hundred ninety billion, two hundred twenty-one million, one hundred twenty-one thousand".