221535442412 has 6 divisors (see below), whose sum is σ = 387687024228. Its totient is φ = 110767721204.

The previous prime is 221535442409. The next prime is 221535442417. The reversal of 221535442412 is 214244535122.

221535442412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221535442417) 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 as a sum of consecutive naturals, namely, 27691930298 + ... + 27691930305.

It is an arithmetic number, because the mean of its divisors is an integer number (64614504038).

Almost surely, 2^221535442412 is an apocalyptic number.

It is an amenable number.

221535442412 is a deficient number, since it is larger than the sum of its proper divisors (166151581816).

221535442412 is a wasteful number, since it uses less digits than its factorization.

221535442412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55383860607 (or 55383860605 counting only the distinct ones).

The product of its digits is 76800, while the sum is 35.

Adding to 221535442412 its reverse (214244535122), we get a palindrome (435779977534).

The spelling of 221535442412 in words is "two hundred twenty-one billion, five hundred thirty-five million, four hundred forty-two thousand, four hundred twelve".