123213323021 has 4 divisors (see below), whose sum is σ = 123219588672. Its totient is φ = 123207057372.

The previous prime is 123213323011. The next prime is 123213323039. The reversal of 123213323021 is 120323312321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120323312321 = 281 ⋅428196841.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123213323021 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 (123213323011) 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, 3103235 + ... + 3142688.

It is an arithmetic number, because the mean of its divisors is an integer number (30804897168).

Almost surely, 2^123213323021 is an apocalyptic number.

It is an amenable number.

123213323021 is a deficient number, since it is larger than the sum of its proper divisors (6265651).

123213323021 is an equidigital number, since it uses as much as digits as its factorization.

123213323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265650.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 123213323021 its reverse (120323312321), we get a palindrome (243536635342).

The spelling of 123213323021 in words is "one hundred twenty-three billion, two hundred thirteen million, three hundred twenty-three thousand, twenty-one".