21201100220001 has 32 divisors (see below), whose sum is σ = 33634796832000. Its totient is φ = 11745484591104.

The previous prime is 21201100219997. The next prime is 21201100220023. The reversal of 21201100220001 is 10002200110212.

It is not a de Polignac number, because 21201100220001 - 2² = 21201100219997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201100220051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695148376 + ... + 695178873.

It is an arithmetic number, because the mean of its divisors is an integer number (1051087401000).

Almost surely, 2^{21201100220001} is an apocalyptic number.

It is an amenable number.

21201100220001 is a deficient number, since it is larger than the sum of its proper divisors (12433696611999).

21201100220001 is a wasteful number, since it uses less digits than its factorization.

21201100220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390327305.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21201100220001 its reverse (10002200110212), we get a palindrome (31203300330213).

The spelling of 21201100220001 in words is "twenty-one trillion, two hundred one billion, one hundred million, two hundred twenty thousand, one".