103010321021 has 4 divisors (see below), whose sum is σ = 103011497052. Its totient is φ = 103009144992.

The previous prime is 103010321003. The next prime is 103010321059. The reversal of 103010321021 is 120123010301.

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 65902077796 + 37108243225 = 256714^2 + 192635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103010321021 is a prime.

It is a super-2 number, since 2×103010321021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103010320987 and 103010321005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103016321021) 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, 445040 + ... + 635673.

It is an arithmetic number, because the mean of its divisors is an integer number (25752874263).

Almost surely, 2^103010321021 is an apocalyptic number.

It is an amenable number.

103010321021 is a deficient number, since it is larger than the sum of its proper divisors (1176031).

103010321021 is an equidigital number, since it uses as much as digits as its factorization.

103010321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176030.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 103010321021 its reverse (120123010301), we get a palindrome (223133331322).

The spelling of 103010321021 in words is "one hundred three billion, ten million, three hundred twenty-one thousand, twenty-one".