123121143004213 has 4 divisors (see below), whose sum is σ = 124604530269408. Its totient is φ = 121637755739020.

The previous prime is 123121143004207. The next prime is 123121143004217. The reversal of 123121143004213 is 312400341121321.

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 a cyclic number.

It is not a de Polignac number, because 123121143004213 - 2²⁵ = 123121109449781 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 (123121143004217) 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, 741693632473 + ... + 741693632638.

It is an arithmetic number, because the mean of its divisors is an integer number (31151132567352).

Almost surely, 2^{123121143004213} is an apocalyptic number.

It is an amenable number.

123121143004213 is a deficient number, since it is larger than the sum of its proper divisors (1483387265195).

123121143004213 is an equidigital number, since it uses as much as digits as its factorization.

123121143004213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483387265194.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 123121143004213 its reverse (312400341121321), we get a palindrome (435521484125534).

The spelling of 123121143004213 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, one hundred forty-three million, four thousand, two hundred thirteen".