21201014142243 has 32 divisors (see below), whose sum is σ = 33839732521280. Its totient is φ = 13041087609600.

The previous prime is 21201014142221. The next prime is 21201014142283. The reversal of 21201014142243 is 34224141010212.

21201014142243 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 1 + 0 + 1 + 414 + 2 + 243 = 666.

It is not a de Polignac number, because 21201014142243 - 2⁸ = 21201014141987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201014142283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12366058 + ... + 13975743.

It is an arithmetic number, because the mean of its divisors is an integer number (1057491641290).

Almost surely, 2^{21201014142243} is an apocalyptic number.

21201014142243 is a deficient number, since it is larger than the sum of its proper divisors (12638718379037).

21201014142243 is a wasteful number, since it uses less digits than its factorization.

21201014142243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26344116 (or 26344110 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21201014142243 its reverse (34224141010212), we get a palindrome (55425155152455).

The spelling of 21201014142243 in words is "twenty-one trillion, two hundred one billion, fourteen million, one hundred forty-two thousand, two hundred forty-three".