1212323111013 has 32 divisors (see below), whose sum is σ = 1944746864640. Its totient is φ = 656238369600.

The previous prime is 1212323110987. The next prime is 1212323111023. The reversal of 1212323111013 is 3101113232121.

It is not a de Polignac number, because 1212323111013 - 2¹⁶ = 1212323045477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212323111023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4702756 + ... + 4953842.

It is an arithmetic number, because the mean of its divisors is an integer number (60773339520).

Almost surely, 2^{1212323111013} is an apocalyptic number.

It is an amenable number.

1212323111013 is a deficient number, since it is larger than the sum of its proper divisors (732423753627).

1212323111013 is a wasteful number, since it uses less digits than its factorization.

1212323111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263217.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1212323111013 its reverse (3101113232121), we get a palindrome (4313436343134).

The spelling of 1212323111013 in words is "one trillion, two hundred twelve billion, three hundred twenty-three million, one hundred eleven thousand, thirteen".