201111222001 has 8 divisors (see below), whose sum is σ = 202620199880. Its totient is φ = 199607058432.

The previous prime is 201111221989. The next prime is 201111222061. The reversal of 201111222001 is 100222111102.

It can be written as a sum of positive squares in 4 ways, for example, as 443060401 + 200668161600 = 21049^2 + 447960^2 .

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 201111222001 - 2¹⁵ = 201111189233 is a prime.

It is a super-2 number, since 2×201111222001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111222061) 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, 1119696 + ... + 1286833.

It is an arithmetic number, because the mean of its divisors is an integer number (25327524985).

Almost surely, 2^201111222001 is an apocalyptic number.

It is an amenable number.

201111222001 is a deficient number, since it is larger than the sum of its proper divisors (1508977879).

201111222001 is a wasteful number, since it uses less digits than its factorization.

201111222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407155.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201111222001 its reverse (100222111102), we get a palindrome (301333333103).

The spelling of 201111222001 in words is "two hundred one billion, one hundred eleven million, two hundred twenty-two thousand, one".