103121210020321 has 4 divisors (see below), whose sum is σ = 103157610026692. Its totient is φ = 103084810013952.

The previous prime is 103121210020307. The next prime is 103121210020333. The reversal of 103121210020321 is 123020012121301.

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 72095196010321 + 31026014010000 = 8490889^2 + 5570100^2 .

It is a cyclic number.

It is not a de Polignac number, because 103121210020321 - 2¹⁵ = 103121209987553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103121210020021) 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, 18199998936 + ... + 18200004601.

It is an arithmetic number, because the mean of its divisors is an integer number (25789402506673).

Almost surely, 2^{103121210020321} is an apocalyptic number.

It is an amenable number.

103121210020321 is a deficient number, since it is larger than the sum of its proper divisors (36400006371).

103121210020321 is an equidigital number, since it uses as much as digits as its factorization.

103121210020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36400006370.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 103121210020321 its reverse (123020012121301), we get a palindrome (226141222141622).

The spelling of 103121210020321 in words is "one hundred three trillion, one hundred twenty-one billion, two hundred ten million, twenty thousand, three hundred twenty-one".