103130311021 has 2 divisors, whose sum is σ = 103130311022. Its totient is φ = 103130311020.

The previous prime is 103130311019. The next prime is 103130311027. The reversal of 103130311021 is 120113031301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101968455625 + 1161855396 = 319325^2 + 34086^2 .

It is an emirp because it is prime and its reverse (120113031301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103130311021 - 2¹ = 103130311019 is a prime.

It is a super-2 number, since 2×103130311021² (a number of 23 digits) contains 22 as substring.

Together with 103130311019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 103130310986 and 103130311004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103130311027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51565155510 + 51565155511.

It is an arithmetic number, because the mean of its divisors is an integer number (51565155511).

Almost surely, 2^103130311021 is an apocalyptic number.

It is an amenable number.

103130311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

103130311021 is an equidigital number, since it uses as much as digits as its factorization.

103130311021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 103130311021 its reverse (120113031301), we get a palindrome (223243342322).

The spelling of 103130311021 in words is "one hundred three billion, one hundred thirty million, three hundred eleven thousand, twenty-one".