20002211100021 has 32 divisors (see below), whose sum is σ = 27143004119040. Its totient is φ = 13098472920000.

The previous prime is 20002211099953. The next prime is 20002211100041. The reversal of 20002211100021 is 12000111220002.

It is not a de Polignac number, because 20002211100021 - 2¹⁰ = 20002211098997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002211100041) 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 31 ways as a sum of consecutive naturals, for example, 1941768571 + ... + 1941778871.

It is an arithmetic number, because the mean of its divisors is an integer number (848218878720).

Almost surely, 2^{20002211100021} is an apocalyptic number.

It is an amenable number.

20002211100021 is a deficient number, since it is larger than the sum of its proper divisors (7140793019019).

20002211100021 is a wasteful number, since it uses less digits than its factorization.

20002211100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20002211100021 its reverse (12000111220002), we get a palindrome (32002322320023).

The spelling of 20002211100021 in words is "twenty trillion, two billion, two hundred eleven million, one hundred thousand, twenty-one".