320121203123 has 2 divisors, whose sum is σ = 320121203124. Its totient is φ = 320121203122.

The previous prime is 320121203111. The next prime is 320121203131. The reversal of 320121203123 is 321302121023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320121203123 - 2³⁸ = 45243296179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320121203095 and 320121203104.

It is not a weakly prime, because it can be changed into another prime (320121202123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160060601561 + 160060601562.

It is an arithmetic number, because the mean of its divisors is an integer number (160060601562).

Almost surely, 2^320121203123 is an apocalyptic number.

320121203123 is a deficient number, since it is larger than the sum of its proper divisors (1).

320121203123 is an equidigital number, since it uses as much as digits as its factorization.

320121203123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 320121203123 its reverse (321302121023), we get a palindrome (641423324146).

The spelling of 320121203123 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred three thousand, one hundred twenty-three".