2212111001 has 4 divisors (see below), whose sum is σ = 2212862052. Its totient is φ = 2211359952.

The previous prime is 2212110983. The next prime is 2212111021. The reversal of 2212111001 is 1001112122.

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 1035552400 + 1176558601 = 32180^2 + 34301^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212111001 - 2²⁶ = 2145002137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2212111021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371090 + ... + 377003.

It is an arithmetic number, because the mean of its divisors is an integer number (553215513).

Almost surely, 2^2212111001 is an apocalyptic number.

It is an amenable number.

2212111001 is a deficient number, since it is larger than the sum of its proper divisors (751051).

2212111001 is an equidigital number, since it uses as much as digits as its factorization.

2212111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751050.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2212111001 is about 47033.0841110808. The cubic root of 2212111001 is about 1302.9736663133.

Adding to 2212111001 its reverse (1001112122), we get a palindrome (3213223123).

The spelling of 2212111001 in words is "two billion, two hundred twelve million, one hundred eleven thousand, one".