21201022202023 has 16 divisors (see below), whose sum is σ = 22384594330560. Its totient is φ = 20039535039744.

The previous prime is 21201022201999. The next prime is 21201022202033. The reversal of 21201022202023 is 32020222010212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201022202023 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 (21201022202033) 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 15 ways as a sum of consecutive naturals, for example, 406765 + ... + 6524377.

It is an arithmetic number, because the mean of its divisors is an integer number (1399037145660).

Almost surely, 2^{21201022202023} is an apocalyptic number.

21201022202023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21201022202023 is a deficient number, since it is larger than the sum of its proper divisors (1183572128537).

21201022202023 is a wasteful number, since it uses less digits than its factorization.

21201022202023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119418.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21201022202023 its reverse (32020222010212), we get a palindrome (53221244212235).

The spelling of 21201022202023 in words is "twenty-one trillion, two hundred one billion, twenty-two million, two hundred two thousand, twenty-three".