21121020221101 has 8 divisors (see below), whose sum is σ = 21661354713600. Its totient is φ = 20581885140960.

The previous prime is 21121020221087. The next prime is 21121020221117. The reversal of 21121020221101 is 10112202012112.

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

It is not a de Polignac number, because 21121020221101 - 2⁷ = 21121020220973 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 (21121020228101) 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, 299817421 + ... + 299887858.

It is an arithmetic number, because the mean of its divisors is an integer number (2707669339200).

Almost surely, 2^{21121020221101} is an apocalyptic number.

It is an amenable number.

21121020221101 is a deficient number, since it is larger than the sum of its proper divisors (540334492499).

21121020221101 is an equidigital number, since it uses as much as digits as its factorization.

21121020221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599706179.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121020221101 its reverse (10112202012112), we get a palindrome (31233222233213).

The spelling of 21121020221101 in words is "twenty-one trillion, one hundred twenty-one billion, twenty million, two hundred twenty-one thousand, one hundred one".