1201202222221 has 4 divisors (see below), whose sum is σ = 1201212240700. Its totient is φ = 1201192203744.

The previous prime is 1201202222159. The next prime is 1201202222237. The reversal of 1201202222221 is 1222222021021.

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 939251722500 + 261950499721 = 969150^2 + 511811^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201202222221 - 2¹⁹ = 1201201697933 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 (1201202222261) 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, 4827186 + ... + 5069923.

It is an arithmetic number, because the mean of its divisors is an integer number (300303060175).

Almost surely, 2^{1201202222221} is an apocalyptic number.

It is an amenable number.

1201202222221 is a deficient number, since it is larger than the sum of its proper divisors (10018479).

1201202222221 is an equidigital number, since it uses as much as digits as its factorization.

1201202222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018478.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1201202222221 its reverse (1222222021021), we get a palindrome (2423424243242).

The spelling of 1201202222221 in words is "one trillion, two hundred one billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty-one".