21143201424221 has 8 divisors (see below), whose sum is σ = 22256091448320. Its totient is φ = 20030320395072.

The previous prime is 21143201424139. The next prime is 21143201424299. The reversal of 21143201424221 is 12242410234112.

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 21143201424221 - 2¹⁴ = 21143201407837 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 (21143201024221) 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, 2875541 + ... + 7110213.

It is an arithmetic number, because the mean of its divisors is an integer number (2782011431040).

Almost surely, 2^{21143201424221} is an apocalyptic number.

It is an amenable number.

21143201424221 is a deficient number, since it is larger than the sum of its proper divisors (1112890024099).

21143201424221 is a wasteful number, since it uses less digits than its factorization.

21143201424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4497475.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21143201424221 its reverse (12242410234112), we get a palindrome (33385611658333).

The spelling of 21143201424221 in words is "twenty-one trillion, one hundred forty-three billion, two hundred one million, four hundred twenty-four thousand, two hundred twenty-one".