21132143121 has 8 divisors (see below), whose sum is σ = 29659148320. Its totient is φ = 13346616672.

The previous prime is 21132143119. The next prime is 21132143167. The reversal of 21132143121 is 12134123112.

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

It is not a de Polignac number, because 21132143121 - 2¹ = 21132143119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132143101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185369620 + ... + 185369733.

It is an arithmetic number, because the mean of its divisors is an integer number (3707393540).

Almost surely, 2^21132143121 is an apocalyptic number.

It is an amenable number.

21132143121 is a deficient number, since it is larger than the sum of its proper divisors (8527005199).

21132143121 is a wasteful number, since it uses less digits than its factorization.

21132143121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370739375.

The product of its digits is 288, while the sum is 21.

Adding to 21132143121 its reverse (12134123112), we get a palindrome (33266266233).

The spelling of 21132143121 in words is "twenty-one billion, one hundred thirty-two million, one hundred forty-three thousand, one hundred twenty-one".