222212001 has 16 divisors (see below), whose sum is σ = 323723520. Its totient is φ = 134463120.

The previous prime is 222211943. The next prime is 222212009. The reversal of 222212001 is 100212222.

It is a de Polignac number, because none of the positive numbers 2^k-222212001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17610 + ... + 27468.

It is an arithmetic number, because the mean of its divisors is an integer number (20232720).

Almost surely, 2^222212001 is an apocalyptic number.

It is an amenable number.

222212001 is a deficient number, since it is larger than the sum of its proper divisors (101511519).

222212001 is a wasteful number, since it uses less digits than its factorization.

222212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 222212001 is about 14906.7770158408. Note that the first 3 decimals coincide. The cubic root of 222212001 is about 605.6975775383.

Adding to 222212001 its reverse (100212222), we get a palindrome (322424223).

The spelling of 222212001 in words is "two hundred twenty-two million, two hundred twelve thousand, one".