13143121021 has 8 divisors (see below), whose sum is σ = 13281649920. Its totient is φ = 13004654208.

The previous prime is 13143120997. The next prime is 13143121037. The reversal of 13143121021 is 12012134131.

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 13143121021 - 2¹⁷ = 13142989949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13143121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143121091) 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, 499230 + ... + 524896.

It is an arithmetic number, because the mean of its divisors is an integer number (1660206240).

Almost surely, 2^13143121021 is an apocalyptic number.

It is an amenable number.

13143121021 is a deficient number, since it is larger than the sum of its proper divisors (138528899).

13143121021 is an equidigital number, since it uses as much as digits as its factorization.

13143121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31043.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 13143121021 its reverse (12012134131), we get a palindrome (25155255152).

The spelling of 13143121021 in words is "thirteen billion, one hundred forty-three million, one hundred twenty-one thousand, twenty-one".