21240213231341 has 16 divisors (see below), whose sum is σ = 22949661571200. Its totient is φ = 19541636643648.

The previous prime is 21240213231323. The next prime is 21240213231383. The reversal of 21240213231341 is 14313231204212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21240213231341 - 2³⁰ = 21239139489517 is a prime.

It is a super-2 number, since 2×21240213231341² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240213231311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5376650 + ... + 8449188.

It is an arithmetic number, because the mean of its divisors is an integer number (1434353848200).

Almost surely, 2^{21240213231341} is an apocalyptic number.

It is an amenable number.

21240213231341 is a deficient number, since it is larger than the sum of its proper divisors (1709448339859).

21240213231341 is a wasteful number, since it uses less digits than its factorization.

21240213231341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074308.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21240213231341 its reverse (14313231204212), we get a palindrome (35553444435553).

The spelling of 21240213231341 in words is "twenty-one trillion, two hundred forty billion, two hundred thirteen million, two hundred thirty-one thousand, three hundred forty-one".