103204421021 has 4 divisors (see below), whose sum is σ = 111143222652. Its totient is φ = 95265619392.

The previous prime is 103204420999. The next prime is 103204421057. The reversal of 103204421021 is 120124402301.

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 59768025625 + 43436395396 = 244475^2 + 208414^2 .

It is a cyclic number.

It is not a de Polignac number, because 103204421021 - 2¹⁴ = 103204404637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103204420984 and 103204421002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103204421071) 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, 3969400796 + ... + 3969400821.

It is an arithmetic number, because the mean of its divisors is an integer number (27785805663).

Almost surely, 2^103204421021 is an apocalyptic number.

It is an amenable number.

103204421021 is a deficient number, since it is larger than the sum of its proper divisors (7938801631).

103204421021 is an equidigital number, since it uses as much as digits as its factorization.

103204421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7938801630.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 103204421021 its reverse (120124402301), we get a palindrome (223328823322).

The spelling of 103204421021 in words is "one hundred three billion, two hundred four million, four hundred twenty-one thousand, twenty-one".