21100030222121 has 8 divisors (see below), whose sum is σ = 21134467307520. Its totient is φ = 21065607279072.

The previous prime is 21100030222111. The next prime is 21100030222123. The reversal of 21100030222121 is 12122203000112.

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

It is a cyclic number.

It is not a de Polignac number, because 21100030222121 - 2⁶ = 21100030222057 is a prime.

It is a super-2 number, since 2×21100030222121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100030222121.

It is not an unprimeable number, because it can be changed into a prime (21100030222123) 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, 547145 + ... + 6519158.

It is an arithmetic number, because the mean of its divisors is an integer number (2641808413440).

Almost surely, 2^{21100030222121} is an apocalyptic number.

It is an amenable number.

21100030222121 is a deficient number, since it is larger than the sum of its proper divisors (34437085399).

21100030222121 is an equidigital number, since it uses as much as digits as its factorization.

21100030222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7071175.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21100030222121 its reverse (12122203000112), we get a palindrome (33222233222233).

The spelling of 21100030222121 in words is "twenty-one trillion, one hundred billion, thirty million, two hundred twenty-two thousand, one hundred twenty-one".