6121821145 has 16 divisors (see below), whose sum is σ = 8019849600. Its totient is φ = 4448995200.

The previous prime is 6121821133. The next prime is 6121821157. The reversal of 6121821145 is 5411281216.

It is an interprime number because it is at equal distance from previous prime (6121821133) and next prime (6121821157).

It is not a de Polignac number, because 6121821145 - 2⁵ = 6121821113 is a prime.

It is a super-2 number, since 2×6121821145² = 74953388262738222050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 37165 + ... + 116725.

It is an arithmetic number, because the mean of its divisors is an integer number (501240600).

Almost surely, 2^6121821145 is an apocalyptic number.

It is an amenable number.

6121821145 is a deficient number, since it is larger than the sum of its proper divisors (1898028455).

6121821145 is a wasteful number, since it uses less digits than its factorization.

6121821145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80976.

The product of its digits is 3840, while the sum is 31.

The square root of 6121821145 is about 78242.0676171074. The cubic root of 6121821145 is about 1829.3362722842.

The spelling of 6121821145 in words is "six billion, one hundred twenty-one million, eight hundred twenty-one thousand, one hundred forty-five".