21022212220001 has 8 divisors (see below), whose sum is σ = 21226792641600. Its totient is φ = 20817641053872.

The previous prime is 21022212219941. The next prime is 21022212220003. The reversal of 21022212220001 is 10002221222012.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022212220001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21022212220003) 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, 2295350 + ... + 6878448.

It is an arithmetic number, because the mean of its divisors is an integer number (2653349080200).

Almost surely, 2^{21022212220001} is an apocalyptic number.

It is an amenable number.

21022212220001 is a deficient number, since it is larger than the sum of its proper divisors (204580421599).

21022212220001 is a wasteful number, since it uses less digits than its factorization.

21022212220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4627735.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21022212220001 its reverse (10002221222012), we get a palindrome (31024433442013).

The spelling of 21022212220001 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, two hundred twenty thousand, one".