1203123123 has 24 divisors (see below), whose sum is σ = 1815410688. Its totient is φ = 766359792.

The previous prime is 1203123083. The next prime is 1203123151. The reversal of 1203123123 is 3213213021.

It is not a de Polignac number, because 1203123123 - 2¹⁷ = 1202992051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203123096 and 1203123105.

It is not an unprimeable number, because it can be changed into a prime (1203123023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222336 + ... + 227682.

It is an arithmetic number, because the mean of its divisors is an integer number (75642112).

Almost surely, 2^1203123123 is an apocalyptic number.

1203123123 is a deficient number, since it is larger than the sum of its proper divisors (612287565).

1203123123 is a wasteful number, since it uses less digits than its factorization.

1203123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463 (or 6460 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1203123123 is about 34686.0652568146. The cubic root of 1203123123 is about 1063.5796631799.

Adding to 1203123123 its reverse (3213213021), we get a palindrome (4416336144).

The spelling of 1203123123 in words is "one billion, two hundred three million, one hundred twenty-three thousand, one hundred twenty-three".