2121155072 has 40 divisors (see below), whose sum is σ = 4242585600. Its totient is φ = 1059472384.

The previous prime is 2121155063. The next prime is 2121155081. The reversal of 2121155072 is 2705511212.

It is an interprime number because it is at equal distance from previous prime (2121155063) and next prime (2121155081).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735329 + ... + 738207.

It is an arithmetic number, because the mean of its divisors is an integer number (106064640).

Almost surely, 2^2121155072 is an apocalyptic number.

It is an amenable number.

2121155072 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

2121155072 is an equidigital number, since it uses as much as digits as its factorization.

2121155072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336 (or 4320 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 2121155072 is about 46055.9993051937. Note that the first 3 decimals coincide. The cubic root of 2121155072 is about 1284.8649238527.

Adding to 2121155072 its reverse (2705511212), we get a palindrome (4826666284).

The spelling of 2121155072 in words is "two billion, one hundred twenty-one million, one hundred fifty-five thousand, seventy-two".