2121112554 has 32 divisors (see below), whose sum is σ = 4686474240. Its totient is φ = 634623600.

The previous prime is 2121112549. The next prime is 2121112561. The reversal of 2121112554 is 4552111212.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198192 + ... + 208619.

It is an arithmetic number, because the mean of its divisors is an integer number (146452320).

Almost surely, 2^2121112554 is an apocalyptic number.

2121112554 is an abundant number, since it is smaller than the sum of its proper divisors (2565361686).

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

2121112554 is a wasteful number, since it uses less digits than its factorization.

2121112554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406906.

The product of its digits is 800, while the sum is 24.

The square root of 2121112554 is about 46055.5377126356. The cubic root of 2121112554 is about 1284.8563388679.

Adding to 2121112554 its reverse (4552111212), we get a palindrome (6673223766).

The spelling of 2121112554 in words is "two billion, one hundred twenty-one million, one hundred twelve thousand, five hundred fifty-four".