211021223130 has 48 divisors (see below), whose sum is σ = 566353741824. Its totient is φ = 54457089120.

The previous prime is 211021223087. The next prime is 211021223183. The reversal of 211021223130 is 31322120112.

211021223130 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211021223130² (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 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 23 ways as a sum of consecutive naturals, for example, 37814634 + ... + 37820213.

It is an arithmetic number, because the mean of its divisors is an integer number (11799036288).

Almost surely, 2^211021223130 is an apocalyptic number.

211021223130 is an abundant number, since it is smaller than the sum of its proper divisors (355332518694).

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

211021223130 is a wasteful number, since it uses less digits than its factorization.

211021223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75634891 (or 75634888 counting only the distinct ones).

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

Adding to 211021223130 its reverse (31322120112), we get a palindrome (242343343242).

The spelling of 211021223130 in words is "two hundred eleven billion, twenty-one million, two hundred twenty-three thousand, one hundred thirty".