1102201220221 has 4 divisors (see below), whose sum is σ = 1102222260252. Its totient is φ = 1102180180192.

The previous prime is 1102201220191. The next prime is 1102201220251. The reversal of 1102201220221 is 1220221022011.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1102201220191) and next prime (1102201220251).

It can be written as a sum of positive squares in 2 ways, for example, as 768909765625 + 333291454596 = 876875^2 + 577314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102201220221 - 2⁵ = 1102201220189 is a prime.

It is a super-2 number, since 2×1102201220221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102201220195 and 1102201220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102201220251) 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 3 ways as a sum of consecutive naturals, for example, 10441240 + ... + 10546273.

It is an arithmetic number, because the mean of its divisors is an integer number (275555565063).

Almost surely, 2^{1102201220221} is an apocalyptic number.

It is an amenable number.

1102201220221 is a deficient number, since it is larger than the sum of its proper divisors (21040031).

1102201220221 is an equidigital number, since it uses as much as digits as its factorization.

1102201220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21040030.

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

Adding to 1102201220221 its reverse (1220221022011), we get a palindrome (2322422242232).

The spelling of 1102201220221 in words is "one trillion, one hundred two billion, two hundred one million, two hundred twenty thousand, two hundred twenty-one".