222101111001001 has 4 divisors (see below), whose sum is σ = 235165882236372. Its totient is φ = 209036339765632.

The previous prime is 222101111000999. The next prime is 222101111001017. The reversal of 222101111001001 is 100100111101222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128353015831401 + 93748095169600 = 11329299^2 + 9682360^2 .

It is a cyclic number.

It is not a de Polignac number, because 222101111001001 - 2¹ = 222101111000999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222101111041001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6532385617660 + ... + 6532385617693.

It is an arithmetic number, because the mean of its divisors is an integer number (58791470559093).

Almost surely, 2^{222101111001001} is an apocalyptic number.

It is an amenable number.

222101111001001 is a deficient number, since it is larger than the sum of its proper divisors (13064771235371).

222101111001001 is a wasteful number, since it uses less digits than its factorization.

222101111001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13064771235370.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 222101111001001 its reverse (100100111101222), we get a palindrome (322201222102223).

The spelling of 222101111001001 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred eleven million, one thousand, one".