123133203021 has 4 divisors (see below), whose sum is σ = 164177604032. Its totient is φ = 82088802012.

The previous prime is 123133203007. The next prime is 123133203097. The reversal of 123133203021 is 120302331321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123133203021 - 2⁹ = 123133202509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133223021) 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, 20522200501 + ... + 20522200506.

It is an arithmetic number, because the mean of its divisors is an integer number (41044401008).

Almost surely, 2^123133203021 is an apocalyptic number.

It is an amenable number.

123133203021 is a deficient number, since it is larger than the sum of its proper divisors (41044401011).

123133203021 is an equidigital number, since it uses as much as digits as its factorization.

123133203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41044401010.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123133203021 its reverse (120302331321), we get a palindrome (243435534342).

The spelling of 123133203021 in words is "one hundred twenty-three billion, one hundred thirty-three million, two hundred three thousand, twenty-one".