2211121001 has 4 divisors (see below), whose sum is σ = 2215737600. Its totient is φ = 2206504404.

The previous prime is 2211120971. The next prime is 2211121019. The reversal of 2211121001 is 1001211122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211121061) 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, 2307581 + ... + 2308538.

It is an arithmetic number, because the mean of its divisors is an integer number (553934400).

Almost surely, 2^2211121001 is an apocalyptic number.

It is an amenable number.

2211121001 is a deficient number, since it is larger than the sum of its proper divisors (4616599).

2211121001 is an equidigital number, since it uses as much as digits as its factorization.

2211121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616598.

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

The square root of 2211121001 is about 47022.5584267807. The cubic root of 2211121001 is about 1302.7792612994.

Adding to 2211121001 its reverse (1001211122), we get a palindrome (3212332123).

The spelling of 2211121001 in words is "two billion, two hundred eleven million, one hundred twenty-one thousand, one".