921121040320 has 56 divisors (see below), whose sum is σ = 2362144063104. Its totient is φ = 340106228736.

The previous prime is 921121040311. The next prime is 921121040327. The reversal of 921121040320 is 23040121129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921121040327) 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, 110707504 + ... + 110715823.

It is an arithmetic number, because the mean of its divisors is an integer number (42181143984).

Almost surely, 2^921121040320 is an apocalyptic number.

It is an amenable number.

921121040320 is an abundant number, since it is smaller than the sum of its proper divisors (1441023022784).

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

921121040320 is a wasteful number, since it uses less digits than its factorization.

921121040320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221423357 (or 221423347 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 921121040320 its reverse (23040121129), we get a palindrome (944161161449).

The spelling of 921121040320 in words is "nine hundred twenty-one billion, one hundred twenty-one million, forty thousand, three hundred twenty".