21021243042133 has 8 divisors (see below), whose sum is σ = 21046722254720. Its totient is φ = 20995769494800.

The previous prime is 21021243042131. The next prime is 21021243042169. The reversal of 21021243042133 is 33124034212012.

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 21021243042133 - 2¹ = 21021243042131 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 (21021243042131) 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, 6033016 + ... + 8856622.

It is an arithmetic number, because the mean of its divisors is an integer number (2630840281840).

Almost surely, 2^{21021243042133} is an apocalyptic number.

It is an amenable number.

21021243042133 is a deficient number, since it is larger than the sum of its proper divisors (25479212587).

21021243042133 is an equidigital number, since it uses as much as digits as its factorization.

21021243042133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832627.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21021243042133 its reverse (33124034212012), we get a palindrome (54145277254145).

The spelling of 21021243042133 in words is "twenty-one trillion, twenty-one billion, two hundred forty-three million, forty-two thousand, one hundred thirty-three".