2221212221011 has 16 divisors (see below), whose sum is σ = 2692533000960. Its totient is φ = 1789922478240.

The previous prime is 2221212220963. The next prime is 2221212221029. The reversal of 2221212221011 is 1101222121222.

It is a cyclic number.

It is not a de Polignac number, because 2221212221011 - 2¹⁹ = 2221211696723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 2221212221011.

It is not an unprimeable number, because it can be changed into a prime (2221212821011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63726256 + ... + 63761101.

It is an arithmetic number, because the mean of its divisors is an integer number (168283312560).

Almost surely, 2^{2221212221011} is an apocalyptic number.

2221212221011 is a deficient number, since it is larger than the sum of its proper divisors (471320779949).

2221212221011 is a wasteful number, since it uses less digits than its factorization.

2221212221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127487514.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2221212221011 its reverse (1101222121222), we get a palindrome (3322434342233).

The spelling of 2221212221011 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, eleven".