2121330188 has 6 divisors (see below), whose sum is σ = 3712327836. Its totient is φ = 1060665092.

The previous prime is 2121330187. The next prime is 2121330229. The reversal of 2121330188 is 8810331212.

It is a super-3 number, since 3×2121330188³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121330188.

It is not an unprimeable number, because it can be changed into a prime (2121330187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265166270 + ... + 265166277.

It is an arithmetic number, because the mean of its divisors is an integer number (618721306).

Almost surely, 2^2121330188 is an apocalyptic number.

It is an amenable number.

2121330188 is a deficient number, since it is larger than the sum of its proper divisors (1590997648).

2121330188 is a wasteful number, since it uses less digits than its factorization.

2121330188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530332551 (or 530332549 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 2121330188 is about 46057.9003863615. The cubic root of 2121330188 is about 1284.9002810373.

The spelling of 2121330188 in words is "two billion, one hundred twenty-one million, three hundred thirty thousand, one hundred eighty-eight".