2121228911 has 8 divisors (see below), whose sum is σ = 2193513264. Its totient is φ = 2050139520.

The previous prime is 2121228871. The next prime is 2121228917. The reversal of 2121228911 is 1198221212.

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 2121228911 - 2²² = 2117034607 is a prime.

It is a super-2 number, since 2×2121228911² = 8999224185724491842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121228917) 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, 295130 + ... + 302231.

It is an arithmetic number, because the mean of its divisors is an integer number (274189158).

Almost surely, 2^2121228911 is an apocalyptic number.

2121228911 is a deficient number, since it is larger than the sum of its proper divisors (72284353).

2121228911 is an equidigital number, since it uses as much as digits as its factorization.

2121228911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597481.

The product of its digits is 1152, while the sum is 29.

The square root of 2121228911 is about 46056.8009201681. The cubic root of 2121228911 is about 1284.8798327171.

The spelling of 2121228911 in words is "two billion, one hundred twenty-one million, two hundred twenty-eight thousand, nine hundred eleven".