133231010123 has 4 divisors (see below), whose sum is σ = 133522544520. Its totient is φ = 132939475728.

The previous prime is 133231010117. The next prime is 133231010137. The reversal of 133231010123 is 321010132331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133231010123 - 2²⁰ = 133229961547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133231010095 and 133231010104.

It is not an unprimeable number, because it can be changed into a prime (133231010183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145766513 + ... + 145767426.

It is an arithmetic number, because the mean of its divisors is an integer number (33380636130).

Almost surely, 2^133231010123 is an apocalyptic number.

133231010123 is a deficient number, since it is larger than the sum of its proper divisors (291534397).

133231010123 is an equidigital number, since it uses as much as digits as its factorization.

133231010123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291534396.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 133231010123 its reverse (321010132331), we get a palindrome (454241142454).

The spelling of 133231010123 in words is "one hundred thirty-three billion, two hundred thirty-one million, ten thousand, one hundred twenty-three".