123206020403 has 2 divisors, whose sum is σ = 123206020404. Its totient is φ = 123206020402.

The previous prime is 123206020397. The next prime is 123206020451. The reversal of 123206020403 is 304020602321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123206020403 - 2¹⁰ = 123206019379 is a prime.

It is not a weakly prime, because it can be changed into another prime (123206020453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61603010201 + 61603010202.

It is an arithmetic number, because the mean of its divisors is an integer number (61603010202).

Almost surely, 2^123206020403 is an apocalyptic number.

123206020403 is a deficient number, since it is larger than the sum of its proper divisors (1).

123206020403 is an equidigital number, since it uses as much as digits as its factorization.

123206020403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 123206020403 its reverse (304020602321), we get a palindrome (427226622724).

The spelling of 123206020403 in words is "one hundred twenty-three billion, two hundred six million, twenty thousand, four hundred three".