21123313141 has 8 divisors (see below), whose sum is σ = 24300804224. Its totient is φ = 17985790800.

The previous prime is 21123313139. The next prime is 21123313153. The reversal of 21123313141 is 14131332112.

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 21123313141 - 2¹ = 21123313139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123313111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9991050 + ... + 9993163.

It is an arithmetic number, because the mean of its divisors is an integer number (3037600528).

Almost surely, 2^21123313141 is an apocalyptic number.

It is an amenable number.

21123313141 is a deficient number, since it is larger than the sum of its proper divisors (3177491083).

21123313141 is a wasteful number, since it uses less digits than its factorization.

21123313141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19984371.

The product of its digits is 432, while the sum is 22.

Adding to 21123313141 its reverse (14131332112), we get a palindrome (35254645253).

The spelling of 21123313141 in words is "twenty-one billion, one hundred twenty-three million, three hundred thirteen thousand, one hundred forty-one".