2021212130 has 64 divisors (see below), whose sum is σ = 4314608640. Its totient is φ = 667021824.

The previous prime is 2021212117. The next prime is 2021212133. The reversal of 2021212130 is 312121202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (2021212133) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 743654 + ... + 746366.

It is an arithmetic number, because the mean of its divisors is an integer number (67415760).

Almost surely, 2^2021212130 is an apocalyptic number.

2021212130 is an abundant number, since it is smaller than the sum of its proper divisors (2293396510).

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

2021212130 is a wasteful number, since it uses less digits than its factorization.

2021212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2021212130 is about 44957.8928554264. The cubic root of 2021212130 is about 1264.3596627958.

Adding to 2021212130 its reverse (312121202), we get a palindrome (2333333332).

The spelling of 2021212130 in words is "two billion, twenty-one million, two hundred twelve thousand, one hundred thirty".