21001012022303 has 16 divisors (see below), whose sum is σ = 21205279233600. Its totient is φ = 20796959589120.

The previous prime is 21001012022297. The next prime is 21001012022453. The reversal of 21001012022303 is 30322021010012.

It is a cyclic number.

It is not a de Polignac number, because 21001012022303 - 2¹⁶ = 21001011956767 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 (21001012022603) 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, 2773139225 + ... + 2773146797.

It is an arithmetic number, because the mean of its divisors is an integer number (1325329952100).

Almost surely, 2^{21001012022303} is an apocalyptic number.

21001012022303 is a deficient number, since it is larger than the sum of its proper divisors (204267211297).

21001012022303 is a wasteful number, since it uses less digits than its factorization.

21001012022303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18242.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21001012022303 its reverse (30322021010012), we get a palindrome (51323033032315).

The spelling of 21001012022303 in words is "twenty-one trillion, one billion, twelve million, twenty-two thousand, three hundred three".