10320021121121 has 4 divisors (see below), whose sum is σ = 10320028324500. Its totient is φ = 10320013917744.

The previous prime is 10320021121117. The next prime is 10320021121271. The reversal of 10320021121121 is 12112112002301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4143305031121 + 6176716090000 = 2035511^2 + 2485300^2 .

It is a cyclic number.

It is not a de Polignac number, because 10320021121121 - 2² = 10320021121117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10320021121121.

It is not an unprimeable number, because it can be changed into a prime (10320021121621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641966 + ... + 4588263.

It is an arithmetic number, because the mean of its divisors is an integer number (2580007081125).

Almost surely, 2^{10320021121121} is an apocalyptic number.

It is an amenable number.

10320021121121 is a deficient number, since it is larger than the sum of its proper divisors (7203379).

10320021121121 is an equidigital number, since it uses as much as digits as its factorization.

10320021121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203378.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 10320021121121 its reverse (12112112002301), we get a palindrome (22432133123422).

The spelling of 10320021121121 in words is "ten trillion, three hundred twenty billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".