21222201110001 has 32 divisors (see below), whose sum is σ = 30354259853568. Its totient is φ = 13154343079680.

The previous prime is 21222201109933. The next prime is 21222201110023. The reversal of 21222201110001 is 10001110222212.

It is not a de Polignac number, because 21222201110001 - 2¹³ = 21222201101809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222201110051) 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, 1464226 + ... + 6677451.

It is an arithmetic number, because the mean of its divisors is an integer number (948570620424).

Almost surely, 2^{21222201110001} is an apocalyptic number.

It is an amenable number.

21222201110001 is a deficient number, since it is larger than the sum of its proper divisors (9132058743567).

21222201110001 is a wasteful number, since it uses less digits than its factorization.

21222201110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8142761.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21222201110001 its reverse (10001110222212), we get a palindrome (31223311332213).

The spelling of 21222201110001 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred ten thousand, one".