212221221011011 has 4 divisors (see below), whose sum is σ = 212221303463952. Its totient is φ = 212221138558072.

The previous prime is 212221221011003. The next prime is 212221221011027. The reversal of 212221221011011 is 110110122122212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212221221011011 - 2³ = 212221221011003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212221221011011.

It is not an unprimeable number, because it can be changed into a prime (212221221021011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37237015 + ... + 42556288.

It is an arithmetic number, because the mean of its divisors is an integer number (53055325865988).

Almost surely, 2^{212221221011011} is an apocalyptic number.

212221221011011 is a deficient number, since it is larger than the sum of its proper divisors (82452941).

212221221011011 is an equidigital number, since it uses as much as digits as its factorization.

212221221011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82452940.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212221221011011 its reverse (110110122122212), we get a palindrome (322331343133223).

The spelling of 212221221011011 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, eleven thousand, eleven".