21101011222201 has 8 divisors (see below), whose sum is σ = 21584581237760. Its totient is φ = 20622400899408.

The previous prime is 21101011222153. The next prime is 21101011222219. The reversal of 21101011222201 is 10222211010112.

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 21101011222201 - 2²⁹ = 21100474351289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101011222231) 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, 1239914586 + ... + 1239931603.

It is an arithmetic number, because the mean of its divisors is an integer number (2698072654720).

Almost surely, 2^{21101011222201} is an apocalyptic number.

It is an amenable number.

21101011222201 is a deficient number, since it is larger than the sum of its proper divisors (483570015559).

21101011222201 is a wasteful number, since it uses less digits than its factorization.

21101011222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479846383.

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

Adding to 21101011222201 its reverse (10222211010112), we get a palindrome (31323222232313).

The spelling of 21101011222201 in words is "twenty-one trillion, one hundred one billion, eleven million, two hundred twenty-two thousand, two hundred one".