1228432348221 has 16 divisors (see below), whose sum is σ = 1764225222144. Its totient is φ = 755820212544.

The previous prime is 1228432348219. The next prime is 1228432348243.

1228432348221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1228432348221 - 2¹ = 1228432348219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228432348291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661901 + ... + 3089106.

It is an arithmetic number, because the mean of its divisors is an integer number (110264076384).

Almost surely, 2^{1228432348221} is an apocalyptic number.

It is an amenable number.

1228432348221 is a deficient number, since it is larger than the sum of its proper divisors (535792873923).

1228432348221 is a wasteful number, since it uses less digits than its factorization.

1228432348221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756500.

The product of its digits is 294912, while the sum is 42.

The spelling of 1228432348221 in words is "one trillion, two hundred twenty-eight billion, four hundred thirty-two million, three hundred forty-eight thousand, two hundred twenty-one".