123011202123 has 16 divisors (see below), whose sum is σ = 182244374560. Its totient is φ = 82004967648.

The previous prime is 123011202107. The next prime is 123011202137. The reversal of 123011202123 is 321202110321.

It is not a de Polignac number, because 123011202123 - 2⁴ = 123011202107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123011202096 and 123011202105.

It is not an unprimeable number, because it can be changed into a prime (123011252123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1390161 + ... + 1475997.

It is an arithmetic number, because the mean of its divisors is an integer number (11390273410).

Almost surely, 2^123011202123 is an apocalyptic number.

123011202123 is a deficient number, since it is larger than the sum of its proper divisors (59233172437).

123011202123 is an equidigital number, since it uses as much as digits as its factorization.

123011202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138923 (or 138917 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123011202123 its reverse (321202110321), we get a palindrome (444213312444).

The spelling of 123011202123 in words is "one hundred twenty-three billion, eleven million, two hundred two thousand, one hundred twenty-three".