2221120221101 has 4 divisors (see below), whose sum is σ = 2351774351772. Its totient is φ = 2090466090432.

The previous prime is 2221120221043. The next prime is 2221120221119. The reversal of 2221120221101 is 1011220211222.

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 1992515749225 + 228604471876 = 1411565^2 + 478126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221120221101 - 2⁶ = 2221120221037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 130654130653 = 2221120221101 / (2 + 2 + 2 + 1 + 1 + 2 + 0 + 2 + 2 + 1 + 1 + 0 + 1).

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 2221120221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221120221161) 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, 65327065310 + ... + 65327065343.

It is an arithmetic number, because the mean of its divisors is an integer number (587943587943).

Almost surely, 2^{2221120221101} is an apocalyptic number.

It is an amenable number.

2221120221101 is a deficient number, since it is larger than the sum of its proper divisors (130654130671).

2221120221101 is a wasteful number, since it uses less digits than its factorization.

2221120221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130654130670.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221120221101 its reverse (1011220211222), we get a palindrome (3232340432323).

The spelling of 2221120221101 in words is "two trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred one".