2121104420 has 12 divisors (see below), whose sum is σ = 4454319324. Its totient is φ = 848441760.

The previous prime is 2121104389. The next prime is 2121104423. The reversal of 2121104420 is 244011212.

It can be written as a sum of positive squares in 2 ways, for example, as 1328456704 + 792647716 = 36448^2 + 28154^2 .

It is not an unprimeable number, because it can be changed into a prime (2121104423) 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, 53027591 + ... + 53027630.

It is an arithmetic number, because the mean of its divisors is an integer number (371193277).

Almost surely, 2^2121104420 is an apocalyptic number.

2121104420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121104420 is an abundant number, since it is smaller than the sum of its proper divisors (2333214904).

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

2121104420 is a wasteful number, since it uses less digits than its factorization.

2121104420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106055230 (or 106055228 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2121104420 is about 46055.4494061235. The cubic root of 2121104420 is about 1284.8546964853.

Adding to 2121104420 its reverse (244011212), we get a palindrome (2365115632).

The spelling of 2121104420 in words is "two billion, one hundred twenty-one million, one hundred four thousand, four hundred twenty".