21002203211101 has 16 divisors (see below), whose sum is σ = 24131615538304. Its totient is φ = 17905101871104.

The previous prime is 21002203211089. The next prime is 21002203211111. The reversal of 21002203211101 is 10111230220012.

It is not a de Polignac number, because 21002203211101 - 2⁹ = 21002203210589 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 (21002203211111) 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, 5377561 + ... + 8421553.

It is an arithmetic number, because the mean of its divisors is an integer number (1508225971144).

Almost surely, 2^{21002203211101} is an apocalyptic number.

It is an amenable number.

21002203211101 is a deficient number, since it is larger than the sum of its proper divisors (3129412327203).

21002203211101 is a wasteful number, since it uses less digits than its factorization.

21002203211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049300.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21002203211101 its reverse (10111230220012), we get a palindrome (31113433431113).

The spelling of 21002203211101 in words is "twenty-one trillion, two billion, two hundred three million, two hundred eleven thousand, one hundred one".