21330412001243 has 8 divisors (see below), whose sum is σ = 21353259649680. Its totient is φ = 21307568182560.

The previous prime is 21330412001233. The next prime is 21330412001263. The reversal of 21330412001243 is 34210021403312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330412001243 is a prime.

It is a super-2 number, since 2×21330412001243² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330412001203) 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, 10258121 + ... + 12160997.

It is an arithmetic number, because the mean of its divisors is an integer number (2669157456210).

Almost surely, 2^{21330412001243} is an apocalyptic number.

21330412001243 is a deficient number, since it is larger than the sum of its proper divisors (22847648437).

21330412001243 is a wasteful number, since it uses less digits than its factorization.

21330412001243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914877.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21330412001243 its reverse (34210021403312), we get a palindrome (55540433404555).

The spelling of 21330412001243 in words is "twenty-one trillion, three hundred thirty billion, four hundred twelve million, one thousand, two hundred forty-three".