21222210120001 has 16 divisors (see below), whose sum is σ = 23343234680448. Its totient is φ = 19292589341520.

The previous prime is 21222210119993. The next prime is 21222210120071. The reversal of 21222210120001 is 10002101222212.

It is a happy number.

It is not a de Polignac number, because 21222210120001 - 2³ = 21222210119993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222210120071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113849791 + ... + 114036043.

It is an arithmetic number, because the mean of its divisors is an integer number (1458952167528).

Almost surely, 2^{21222210120001} is an apocalyptic number.

It is an amenable number.

21222210120001 is a deficient number, since it is larger than the sum of its proper divisors (2121024560447).

21222210120001 is an equidigital number, since it uses as much as digits as its factorization.

21222210120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271893 (or 271871 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222210120001 its reverse (10002101222212), we get a palindrome (31224311342213).

The spelling of 21222210120001 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, one hundred twenty thousand, one".