221222120001 has 8 divisors (see below), whose sum is σ = 298516596000. Its totient is φ = 145704528672.

The previous prime is 221222119981. The next prime is 221222120003. The reversal of 221222120001 is 100021222122.

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

It is not a de Polignac number, because 221222120001 - 2⁵ = 221222119969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221222120003) 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, 444220876 + ... + 444221373.

It is an arithmetic number, because the mean of its divisors is an integer number (37314574500).

Almost surely, 2^221222120001 is an apocalyptic number.

It is an amenable number.

221222120001 is a deficient number, since it is larger than the sum of its proper divisors (77294475999).

221222120001 is an equidigital number, since it uses as much as digits as its factorization.

221222120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888442335.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221222120001 its reverse (100021222122), we get a palindrome (321243342123).

The spelling of 221222120001 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, one".