103202431021 has 2 divisors, whose sum is σ = 103202431022. Its totient is φ = 103202431020.

The previous prime is 103202430979. The next prime is 103202431067. The reversal of 103202431021 is 120134202301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77514355396 + 25688075625 = 278414^2 + 160275^2 .

It is a cyclic number.

It is not a de Polignac number, because 103202431021 - 2¹⁹ = 103201906733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103202431021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103202431121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51601215510 + 51601215511.

It is an arithmetic number, because the mean of its divisors is an integer number (51601215511).

Almost surely, 2^103202431021 is an apocalyptic number.

It is an amenable number.

103202431021 is a deficient number, since it is larger than the sum of its proper divisors (1).

103202431021 is an equidigital number, since it uses as much as digits as its factorization.

103202431021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 103202431021 its reverse (120134202301), we get a palindrome (223336633322).

The spelling of 103202431021 in words is "one hundred three billion, two hundred two million, four hundred thirty-one thousand, twenty-one".