1212013321013 has 4 divisors (see below), whose sum is σ = 1322196350208. Its totient is φ = 1101830291820.

The previous prime is 1212013320983. The next prime is 1212013321021. The reversal of 1212013321013 is 3101233102121.

It is a happy number.

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 1212013321013 - 2¹⁰ = 1212013319989 is a prime.

It is a super-2 number, since 2×1212013321013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212013351013) 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, 55091514581 + ... + 55091514602.

It is an arithmetic number, because the mean of its divisors is an integer number (330549087552).

Almost surely, 2^{1212013321013} is an apocalyptic number.

It is an amenable number.

1212013321013 is a deficient number, since it is larger than the sum of its proper divisors (110183029195).

1212013321013 is a wasteful number, since it uses less digits than its factorization.

1212013321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110183029194.

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

Adding to 1212013321013 its reverse (3101233102121), we get a palindrome (4313246423134).

The spelling of 1212013321013 in words is "one trillion, two hundred twelve billion, thirteen million, three hundred twenty-one thousand, thirteen".