222120001 has 8 divisors (see below), whose sum is σ = 228388608. Its totient is φ = 215892000.

The previous prime is 222119987. The next prime is 222120023. The reversal of 222120001 is 100021222.

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

It is a cyclic number.

It is not a de Polignac number, because 222120001 - 2⁵ = 222119969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222120001.

It is not an unprimeable number, because it can be changed into a prime (222120071) 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, 1116 + ... + 21106.

It is an arithmetic number, because the mean of its divisors is an integer number (28548576).

Almost surely, 2^222120001 is an apocalyptic number.

It is an amenable number.

222120001 is a deficient number, since it is larger than the sum of its proper divisors (6268607).

222120001 is a wasteful number, since it uses less digits than its factorization.

222120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20303.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 222120001 is about 14903.6908515978. The cubic root of 222120001 is about 605.6139758892.

Adding to 222120001 its reverse (100021222), we get a palindrome (322141223).

It can be divided in two parts, 2221 and 20001, that added together give a palindrome (22222).

The spelling of 222120001 in words is "two hundred twenty-two million, one hundred twenty thousand, one".