2221121311 has 8 divisors (see below), whose sum is σ = 2232450000. Its totient is φ = 2209810560.

The previous prime is 2221121303. The next prime is 2221121317. The reversal of 2221121311 is 1131211222.

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 2221121311 - 2³ = 2221121303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292440 + ... + 299938.

It is an arithmetic number, because the mean of its divisors is an integer number (279056250).

Almost surely, 2^2221121311 is an apocalyptic number.

2221121311 is a deficient number, since it is larger than the sum of its proper divisors (11328689).

2221121311 is a wasteful number, since it uses less digits than its factorization.

2221121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969.

The product of its digits is 48, while the sum is 16.

The square root of 2221121311 is about 47128.7737056673. The cubic root of 2221121311 is about 1304.7403487075.

Adding to 2221121311 its reverse (1131211222), we get a palindrome (3352332533).

The spelling of 2221121311 in words is "two billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred eleven".