211130031222 has 32 divisors (see below), whose sum is σ = 511830380160. Its totient is φ = 63978797160.

The previous prime is 211130031173. The next prime is 211130031227. The reversal of 211130031222 is 222130031112.

211130031222 is a `hidden beast` number, since 2 + 111 + 300 + 31 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 211130031195 and 211130031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211130031227) by changing a digit.

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, 177718288 + ... + 177719475.

It is an arithmetic number, because the mean of its divisors is an integer number (15994699380).

Almost surely, 2^211130031222 is an apocalyptic number.

211130031222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211130031222 is an abundant number, since it is smaller than the sum of its proper divisors (300700348938).

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

211130031222 is a wasteful number, since it uses less digits than its factorization.

211130031222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355437785 (or 355437779 counting only the distinct ones).

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

Adding to 211130031222 its reverse (222130031112), we get a palindrome (433260062334).

The spelling of 211130031222 in words is "two hundred eleven billion, one hundred thirty million, thirty-one thousand, two hundred twenty-two".