212011220331 has 6 divisors (see below), whose sum is σ = 306238429380. Its totient is φ = 141340813548.

The previous prime is 212011220321. The next prime is 212011220401. The reversal of 212011220331 is 133022110212.

212011220331 is a `hidden beast` number, since 212 + 0 + 1 + 122 + 0 + 331 = 666.

It is not a de Polignac number, because 212011220331 - 2¹⁰ = 212011219307 is a prime.

It is a super-2 number, since 2×212011220331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212011220321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11778401121 + ... + 11778401138.

It is an arithmetic number, because the mean of its divisors is an integer number (51039738230).

Almost surely, 2^212011220331 is an apocalyptic number.

212011220331 is a deficient number, since it is larger than the sum of its proper divisors (94227209049).

212011220331 is a wasteful number, since it uses less digits than its factorization.

212011220331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23556802265 (or 23556802262 counting only the distinct ones).

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

Adding to 212011220331 its reverse (133022110212), we get a palindrome (345033330543).

The spelling of 212011220331 in words is "two hundred twelve billion, eleven million, two hundred twenty thousand, three hundred thirty-one".