2121105012 has 48 divisors (see below), whose sum is σ = 5333903232. Its totient is φ = 652164480.

The previous prime is 2121104987. The next prime is 2121105013. The reversal of 2121105012 is 2105011212.

It is a junction number, because it is equal to n+sod(n) for n = 2121104982 and 2121105000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121105013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246462 + ... + 254922.

It is an arithmetic number, because the mean of its divisors is an integer number (111122984).

Almost surely, 2^2121105012 is an apocalyptic number.

It is an amenable number.

2121105012 is an abundant number, since it is smaller than the sum of its proper divisors (3212798220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121105012 is a wasteful number, since it uses less digits than its factorization.

2121105012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10088 (or 10086 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 2121105012 is about 46055.4558331584. The cubic root of 2121105012 is about 1284.8548160196.

Adding to 2121105012 its reverse (2105011212), we get a palindrome (4226116224).

The spelling of 2121105012 in words is "two billion, one hundred twenty-one million, one hundred five thousand, twelve".