221212321001011 has 6 divisors (see below), whose sum is σ = 223516371117660. Its totient is φ = 218931781599936.

The previous prime is 221212321000963. The next prime is 221212321001027. The reversal of 221212321001011 is 110100123212122.

It is a de Polignac number, because none of the positive numbers 2^k-221212321001011 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 221212321001011.

It is not an unprimeable number, because it can be changed into a prime (221212321001071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11755348281 + ... + 11755367098.

It is an arithmetic number, because the mean of its divisors is an integer number (37252728519610).

Almost surely, 2^{221212321001011} is an apocalyptic number.

221212321001011 is a deficient number, since it is larger than the sum of its proper divisors (2304050116649).

221212321001011 is an frugal number, since it uses more digits than its factorization.

221212321001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23510715573 (or 23510715476 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 221212321001011 its reverse (110100123212122), we get a palindrome (331312444213133).

The spelling of 221212321001011 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, one thousand, eleven".