103421043021 has 4 divisors (see below), whose sum is σ = 137894724032. Its totient is φ = 68947362012.

The previous prime is 103421043007. The next prime is 103421043031. The reversal of 103421043021 is 120340124301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 103421043021 - 2⁶ = 103421042957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103421043031) 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, 17236840501 + ... + 17236840506.

It is an arithmetic number, because the mean of its divisors is an integer number (34473681008).

Almost surely, 2^103421043021 is an apocalyptic number.

It is an amenable number.

103421043021 is a deficient number, since it is larger than the sum of its proper divisors (34473681011).

103421043021 is an equidigital number, since it uses as much as digits as its factorization.

103421043021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34473681010.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 103421043021 its reverse (120340124301), we get a palindrome (223761167322).

The spelling of 103421043021 in words is "one hundred three billion, four hundred twenty-one million, forty-three thousand, twenty-one".