2121212130 has 16 divisors (see below), whose sum is σ = 5090909184. Its totient is φ = 565656560.

The previous prime is 2121212101. The next prime is 2121212147. The reversal of 2121212130 is 312121212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 35353506 + ... + 35353565.

It is an arithmetic number, because the mean of its divisors is an integer number (318181824).

Almost surely, 2^2121212130 is an apocalyptic number.

2121212130 is an abundant number, since it is smaller than the sum of its proper divisors (2969697054).

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

2121212130 is a wasteful number, since it uses less digits than its factorization.

2121212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70707081.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121212130 is about 46056.6187425868. The cubic root of 2121212130 is about 1284.8764444885.

Adding to 2121212130 its reverse (312121212), we get a palindrome (2433333342).

The spelling of 2121212130 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirty".