123311212013 has 8 divisors (see below), whose sum is σ = 134535311040. Its totient is φ = 112089444480.

The previous prime is 123311211977. The next prime is 123311212027. The reversal of 123311212013 is 310212113321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123311212013 - 2⁶ = 123311211949 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 (123311212513) 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, 471353 + ... + 684686.

It is an arithmetic number, because the mean of its divisors is an integer number (16816913880).

Almost surely, 2^123311212013 is an apocalyptic number.

It is an amenable number.

123311212013 is a deficient number, since it is larger than the sum of its proper divisors (11224099027).

123311212013 is a wasteful number, since it uses less digits than its factorization.

123311212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165747.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123311212013 its reverse (310212113321), we get a palindrome (433523325334).

The spelling of 123311212013 in words is "one hundred twenty-three billion, three hundred eleven million, two hundred twelve thousand, thirteen".