103320121021 has 4 divisors (see below), whose sum is σ = 111267822652. Its totient is φ = 95372419392.

The previous prime is 103320121001. The next prime is 103320121063. The reversal of 103320121021 is 120121023301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5062322500 + 98257798521 = 71150^2 + 313461^2 .

It is a cyclic number.

It is not a de Polignac number, because 103320121021 - 2¹³ = 103320112829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103320120986 and 103320121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103320121001) 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, 3973850796 + ... + 3973850821.

It is an arithmetic number, because the mean of its divisors is an integer number (27816955663).

Almost surely, 2^103320121021 is an apocalyptic number.

It is an amenable number.

103320121021 is a deficient number, since it is larger than the sum of its proper divisors (7947701631).

103320121021 is an equidigital number, since it uses as much as digits as its factorization.

103320121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947701630.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 103320121021 its reverse (120121023301), we get a palindrome (223441144322).

The spelling of 103320121021 in words is "one hundred three billion, three hundred twenty million, one hundred twenty-one thousand, twenty-one".