2121123311 has 8 divisors (see below), whose sum is σ = 2249808000. Its totient is φ = 1994143320.

The previous prime is 2121123299. The next prime is 2121123341. The reversal of 2121123311 is 1133211212.

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 2121123311 - 2¹⁴ = 2121106927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121123311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121123341) 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, 423611 + ... + 428588.

It is an arithmetic number, because the mean of its divisors is an integer number (281226000).

Almost surely, 2^2121123311 is an apocalyptic number.

2121123311 is a deficient number, since it is larger than the sum of its proper divisors (128684689).

2121123311 is a wasteful number, since it uses less digits than its factorization.

2121123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852349.

The product of its digits is 72, while the sum is 17.

The square root of 2121123311 is about 46055.6544954037. The cubic root of 2121123311 is about 1284.8585108690.

Adding to 2121123311 its reverse (1133211212), we get a palindrome (3254334523).

The spelling of 2121123311 in words is "two billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred eleven".