1222002221101 has 4 divisors (see below), whose sum is σ = 1222004765212. Its totient is φ = 1221999676992.

The previous prime is 1222002221051. The next prime is 1222002221137. The reversal of 1222002221101 is 1011222002221.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1030813784100 + 191188437001 = 1015290^2 + 437251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222002221101 - 2¹³ = 1222002212909 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 (1222002221501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308046 + ... + 1593391.

It is an arithmetic number, because the mean of its divisors is an integer number (305501191303).

Almost surely, 2^{1222002221101} is an apocalyptic number.

It is an amenable number.

1222002221101 is a deficient number, since it is larger than the sum of its proper divisors (2544111).

1222002221101 is an equidigital number, since it uses as much as digits as its factorization.

1222002221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544110.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1222002221101 its reverse (1011222002221), we get a palindrome (2233224223322).

It can be divided in two parts, 1222002221 and 101, that multiplied together give a palindrome (123422224321).

The spelling of 1222002221101 in words is "one trillion, two hundred twenty-two billion, two million, two hundred twenty-one thousand, one hundred one".