1222101200221 has 4 divisors (see below), whose sum is σ = 1333201309344. Its totient is φ = 1111001091100.

The previous prime is 1222101200161. The next prime is 1222101200237. The reversal of 1222101200221 is 1220021012221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222101200221 - 2⁷ = 1222101200093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222101200195 and 1222101200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222101200261) 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, 55550054545 + ... + 55550054566.

It is an arithmetic number, because the mean of its divisors is an integer number (333300327336).

Almost surely, 2^{1222101200221} is an apocalyptic number.

1222101200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222101200221 is a deficient number, since it is larger than the sum of its proper divisors (111100109123).

1222101200221 is a wasteful number, since it uses less digits than its factorization.

1222101200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111100109122.

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

Adding to 1222101200221 its reverse (1220021012221), we get a palindrome (2442122212442).

The spelling of 1222101200221 in words is "one trillion, two hundred twenty-two billion, one hundred one million, two hundred thousand, two hundred twenty-one".