1203123120123 has 8 divisors (see below), whose sum is σ = 1607378920000. Its totient is φ = 800474700168.

The previous prime is 1203123120109. The next prime is 1203123120149. The reversal of 1203123120123 is 3210213213021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1203123120123 - 2⁴ = 1203123120107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203123120123.

It is not an unprimeable number, because it can be changed into a prime (1203123127123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401843233 + ... + 401846226.

It is an arithmetic number, because the mean of its divisors is an integer number (200922365000).

Almost surely, 2^{1203123120123} is an apocalyptic number.

1203123120123 is a deficient number, since it is larger than the sum of its proper divisors (404255799877).

1203123120123 is an equidigital number, since it uses as much as digits as its factorization.

1203123120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803689961.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1203123120123 its reverse (3210213213021), we get a palindrome (4413336333144).

The spelling of 1203123120123 in words is "one trillion, two hundred three billion, one hundred twenty-three million, one hundred twenty thousand, one hundred twenty-three".