2221220212111 has 16 divisors (see below), whose sum is σ = 2282739056640. Its totient is φ = 2160303203520.

The previous prime is 2221220212103. The next prime is 2221220212139. The reversal of 2221220212111 is 1112120221222.

It is a cyclic number.

It is not a de Polignac number, because 2221220212111 - 2³ = 2221220212103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221220212511) 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 15 ways as a sum of consecutive naturals, for example, 27659026 + ... + 27739216.

It is an arithmetic number, because the mean of its divisors is an integer number (142671191040).

Almost surely, 2^{2221220212111} is an apocalyptic number.

2221220212111 is a deficient number, since it is larger than the sum of its proper divisors (61518844529).

2221220212111 is a wasteful number, since it uses less digits than its factorization.

2221220212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83934.

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

Adding to 2221220212111 its reverse (1112120221222), we get a palindrome (3333340433333).

The spelling of 2221220212111 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred eleven".