212111221011 has 8 divisors (see below), whose sum is σ = 290458609104. Its totient is φ = 137585656800.

The previous prime is 212111221001. The next prime is 212111221037. The reversal of 212111221011 is 110122111212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212111221011 - 2¹⁹ = 212110696723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212111221001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955455840 + ... + 955456061.

It is an arithmetic number, because the mean of its divisors is an integer number (36307326138).

Almost surely, 2^212111221011 is an apocalyptic number.

212111221011 is a deficient number, since it is larger than the sum of its proper divisors (78347388093).

212111221011 is a wasteful number, since it uses less digits than its factorization.

212111221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910911941.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212111221011 its reverse (110122111212), we get a palindrome (322233332223).

The spelling of 212111221011 in words is "two hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, eleven".