12002121013 has 4 divisors (see below), whose sum is σ = 12326502700. Its totient is φ = 11677739328.

The previous prime is 12002121011. The next prime is 12002121037. The reversal of 12002121013 is 31012120021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11595413124 + 406707889 = 107682^2 + 20167^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002121013 - 2¹ = 12002121011 is a prime.

It is a super-2 number, since 2×12002121013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002120984 and 12002121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002121011) 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, 162190788 + ... + 162190861.

It is an arithmetic number, because the mean of its divisors is an integer number (3081625675).

Almost surely, 2^12002121013 is an apocalyptic number.

It is an amenable number.

12002121013 is a deficient number, since it is larger than the sum of its proper divisors (324381687).

12002121013 is an equidigital number, since it uses as much as digits as its factorization.

12002121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324381686.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12002121013 its reverse (31012120021), we get a palindrome (43014241034).

The spelling of 12002121013 in words is "twelve billion, two million, one hundred twenty-one thousand, thirteen".