222101001 has 8 divisors (see below), whose sum is σ = 329038560. Its totient is φ = 148067316.

The previous prime is 222100999. The next prime is 222101003. The reversal of 222101001 is 100101222.

It is an interprime number because it is at equal distance from previous prime (222100999) and next prime (222101003).

It is not a de Polignac number, because 222101001 - 2¹ = 222100999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (222101003) 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, 4112955 + ... + 4113008.

It is an arithmetic number, because the mean of its divisors is an integer number (41129820).

Almost surely, 2^222101001 is an apocalyptic number.

It is an amenable number.

222101001 is a deficient number, since it is larger than the sum of its proper divisors (106937559).

222101001 is an equidigital number, since it uses as much as digits as its factorization.

222101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8225972 (or 8225966 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 222101001 is about 14903.0534119690. The cubic root of 222101001 is about 605.5967074553.

Adding to 222101001 its reverse (100101222), we get a palindrome (322202223).

The spelling of 222101001 in words is "two hundred twenty-two million, one hundred one thousand, one".