1225536355221 has 16 divisors (see below), whose sum is σ = 1664928020736. Its totient is φ = 801585360576.

The previous prime is 1225536355171. The next prime is 1225536355231.

1225536355221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1225536355221 - 2¹⁷ = 1225536224149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225536355231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6646356 + ... + 6828258.

It is an arithmetic number, because the mean of its divisors is an integer number (104058001296).

Almost surely, 2^{1225536355221} is an apocalyptic number.

It is an amenable number.

1225536355221 is a deficient number, since it is larger than the sum of its proper divisors (439391665515).

1225536355221 is a wasteful number, since it uses less digits than its factorization.

1225536355221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224332.

The product of its digits is 540000, while the sum is 42.

The spelling of 1225536355221 in words is "one trillion, two hundred twenty-five billion, five hundred thirty-six million, three hundred fifty-five thousand, two hundred twenty-one".