21002022020203 has 8 divisors (see below), whose sum is σ = 24002339332608. Its totient is φ = 18001711820904.

The previous prime is 21002022020183. The next prime is 21002022020233. The reversal of 21002022020203 is 30202022020012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21002022020203 - 2¹³ = 21002022012011 is a prime.

It is a super-2 number, since 2×21002022020203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002022020233) 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, 8540400 + ... + 10721122.

It is an arithmetic number, because the mean of its divisors is an integer number (3000292416576).

Almost surely, 2^{21002022020203} is an apocalyptic number.

21002022020203 is a deficient number, since it is larger than the sum of its proper divisors (3000317312405).

21002022020203 is a wasteful number, since it uses less digits than its factorization.

21002022020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556553.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21002022020203 its reverse (30202022020012), we get a palindrome (51204044040215).

The spelling of 21002022020203 in words is "twenty-one trillion, two billion, twenty-two million, twenty thousand, two hundred three".