103612312021 has 2 divisors, whose sum is σ = 103612312022. Its totient is φ = 103612312020.

The previous prime is 103612312007. The next prime is 103612312033. The reversal of 103612312021 is 120213216301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59211922225 + 44400389796 = 243335^2 + 210714^2 .

It is an emirp because it is prime and its reverse (120213216301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103612312021 - 2¹⁹ = 103611787733 is a prime.

It is a super-3 number, since 3×103612312021³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 103612311983 and 103612312001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103612312051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51806156010 + 51806156011.

It is an arithmetic number, because the mean of its divisors is an integer number (51806156011).

Almost surely, 2^103612312021 is an apocalyptic number.

It is an amenable number.

103612312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

103612312021 is an equidigital number, since it uses as much as digits as its factorization.

103612312021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 103612312021 its reverse (120213216301), we get a palindrome (223825528322).

The spelling of 103612312021 in words is "one hundred three billion, six hundred twelve million, three hundred twelve thousand, twenty-one".