211221031130 has 32 divisors (see below), whose sum is σ = 381613076928. Its totient is φ = 84174480000.

The previous prime is 211221031127. The next prime is 211221031199. The reversal of 211221031130 is 31130122112.

It is a super-2 number, since 2×211221031130² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221031099 and 211221031108.

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 15 ways as a sum of consecutive naturals, for example, 3026630 + ... + 3095630.

It is an arithmetic number, because the mean of its divisors is an integer number (11925408654).

Almost surely, 2^211221031130 is an apocalyptic number.

211221031130 is a deficient number, since it is larger than the sum of its proper divisors (170392045798).

211221031130 is a wasteful number, since it uses less digits than its factorization.

211221031130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70142.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211221031130 its reverse (31130122112), we get a palindrome (242351153242).

The spelling of 211221031130 in words is "two hundred eleven billion, two hundred twenty-one million, thirty-one thousand, one hundred thirty".