103020312121 has 2 divisors, whose sum is σ = 103020312122. Its totient is φ = 103020312120.

The previous prime is 103020312107. The next prime is 103020312179. The reversal of 103020312121 is 121213020301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98950510096 + 4069802025 = 314564^2 + 63795^2 .

It is a cyclic number.

It is not a de Polignac number, because 103020312121 - 2¹⁷ = 103020181049 is a prime.

It is a super-2 number, since 2×103020312121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103020312095 and 103020312104.

It is not a weakly prime, because it can be changed into another prime (103020312821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51510156060 + 51510156061.

It is an arithmetic number, because the mean of its divisors is an integer number (51510156061).

Almost surely, 2^103020312121 is an apocalyptic number.

It is an amenable number.

103020312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

103020312121 is an equidigital number, since it uses as much as digits as its factorization.

103020312121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 103020312121 its reverse (121213020301), we get a palindrome (224233332422).

The spelling of 103020312121 in words is "one hundred three billion, twenty million, three hundred twelve thousand, one hundred twenty-one".