212122222011 has 96 divisors (see below), whose sum is σ = 369614119680. Its totient is φ = 119873198592.

The previous prime is 212122221967. The next prime is 212122222021. The reversal of 212122222011 is 110222221212.

It is a happy number.

212122222011 is a `hidden beast` number, since 212 + 1 + 222 + 220 + 11 = 666.

It is not a de Polignac number, because 212122222011 - 2²¹ = 212120124859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212122222021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 124997515 + ... + 124999211.

It is an arithmetic number, because the mean of its divisors is an integer number (3850147080).

Almost surely, 2^212122222011 is an apocalyptic number.

212122222011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212122222011 is a deficient number, since it is larger than the sum of its proper divisors (157491897669).

212122222011 is a wasteful number, since it uses less digits than its factorization.

212122222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212122222011 its reverse (110222221212), we get a palindrome (322344443223).

The spelling of 212122222011 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, eleven".