2121245154 has 24 divisors (see below), whose sum is σ = 5252607360. Its totient is φ = 606070008.

The previous prime is 2121245143. The next prime is 2121245237. The reversal of 2121245154 is 4515421212.

It is a happy number.

2121245154 is a `hidden beast` number, since 2 + 121 + 24 + 515 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8417514 + ... + 8417765.

It is an arithmetic number, because the mean of its divisors is an integer number (218858640).

Almost surely, 2^2121245154 is an apocalyptic number.

2121245154 is an abundant number, since it is smaller than the sum of its proper divisors (3131362206).

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

2121245154 is a wasteful number, since it uses less digits than its factorization.

2121245154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16835294 (or 16835291 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2121245154 is about 46056.9772564375. The cubic root of 2121245154 is about 1284.8831123018.

Adding to 2121245154 its reverse (4515421212), we get a palindrome (6636666366).

It can be divided in two parts, 21212 and 45154, that added together give a palindrome (66366).

The spelling of 2121245154 in words is "two billion, one hundred twenty-one million, two hundred forty-five thousand, one hundred fifty-four".