211221230130 has 24 divisors (see below), whose sum is σ = 549175198572. Its totient is φ = 56325661344.

The previous prime is 211221230117. The next prime is 211221230141. The reversal of 211221230130 is 31032122112.

211221230130 is a `hidden beast` number, since 211 + 221 + 230 + 1 + 3 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 211102572681 + 118657449 = 459459^2 + 10893^2 .

It is a super-2 number, since 2×211221230130² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1173451189 + ... + 1173451368.

Almost surely, 2^211221230130 is an apocalyptic number.

211221230130 is an abundant number, since it is smaller than the sum of its proper divisors (337953968442).

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

211221230130 is a wasteful number, since it uses less digits than its factorization.

211221230130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346902570 (or 2346902567 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211221230130 its reverse (31032122112), we get a palindrome (242253352242).

The spelling of 211221230130 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred thirty thousand, one hundred thirty".