123421021213 has 8 divisors (see below), whose sum is σ = 141452180928. Its totient is φ = 105489757824.

The previous prime is 123421021193. The next prime is 123421021219. The reversal of 123421021213 is 312120124321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123421021213 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 (123421021219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24971431 + ... + 24976372.

It is an arithmetic number, because the mean of its divisors is an integer number (17681522616).

Almost surely, 2^123421021213 is an apocalyptic number.

It is an amenable number.

123421021213 is a deficient number, since it is larger than the sum of its proper divisors (18031159715).

123421021213 is an equidigital number, since it uses as much as digits as its factorization.

123421021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49948163.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123421021213 its reverse (312120124321), we get a palindrome (435541145534).

The spelling of 123421021213 in words is "one hundred twenty-three billion, four hundred twenty-one million, twenty-one thousand, two hundred thirteen".