42103001021 has 2 divisors, whose sum is σ = 42103001022. Its totient is φ = 42103001020.

The previous prime is 42103000997. The next prime is 42103001081. The reversal of 42103001021 is 12010030124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23447265625 + 18655735396 = 153125^2 + 136586^2 .

It is a cyclic number.

It is not a de Polignac number, because 42103001021 - 2³⁰ = 41029259197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42103000987 and 42103001005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42103001081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051500510 + 21051500511.

It is an arithmetic number, because the mean of its divisors is an integer number (21051500511).

Almost surely, 2^42103001021 is an apocalyptic number.

It is an amenable number.

42103001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42103001021 is an equidigital number, since it uses as much as digits as its factorization.

42103001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 42103001021 its reverse (12010030124), we get a palindrome (54113031145).

The spelling of 42103001021 in words is "forty-two billion, one hundred three million, one thousand, twenty-one".