20003221021111 has 4 divisors (see below), whose sum is σ = 20007389232000. Its totient is φ = 19999052810224.

The previous prime is 20003221021081. The next prime is 20003221021123. The reversal of 20003221021111 is 11112012230002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20003221021111 - 2⁹ = 20003221020599 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 (20003221025111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2084098246 + ... + 2084107843.

It is an arithmetic number, because the mean of its divisors is an integer number (5001847308000).

Almost surely, 2^{20003221021111} is an apocalyptic number.

20003221021111 is a deficient number, since it is larger than the sum of its proper divisors (4168210889).

20003221021111 is an equidigital number, since it uses as much as digits as its factorization.

20003221021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168210888.

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

Adding to 20003221021111 its reverse (11112012230002), we get a palindrome (31115233251113).

The spelling of 20003221021111 in words is "twenty trillion, three billion, two hundred twenty-one million, twenty-one thousand, one hundred eleven".