2123213130 has 48 divisors (see below), whose sum is σ = 5845085064. Its totient is φ = 532884480.

The previous prime is 2123213111. The next prime is 2123213137. The reversal of 2123213130 is 313123212.

2123213130 is a `hidden beast` number, since 212 + 321 + 3 + 130 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1639521081 + 483692049 = 40491^2 + 21993^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2123213137) 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 in 23 ways as a sum of consecutive naturals, for example, 692331 + ... + 695390.

Almost surely, 2^2123213130 is an apocalyptic number.

2123213130 is an abundant number, since it is smaller than the sum of its proper divisors (3721871934).

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

2123213130 is a wasteful number, since it uses less digits than its factorization.

2123213130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387751 (or 1387748 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2123213130 is about 46078.3368840500. The cubic root of 2123213130 is about 1285.2803377324.

Adding to 2123213130 its reverse (313123212), we get a palindrome (2436336342).

The spelling of 2123213130 in words is "two billion, one hundred twenty-three million, two hundred thirteen thousand, one hundred thirty".