221535042130 has 32 divisors (see below), whose sum is σ = 399619744128. Its totient is φ = 88423843200.

The previous prime is 221535042103. The next prime is 221535042137. The reversal of 221535042130 is 31240535122.

It is not an unprimeable number, because it can be changed into a prime (221535042137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9803745 + ... + 9826315.

It is an arithmetic number, because the mean of its divisors is an integer number (12488117004).

Almost surely, 2^221535042130 is an apocalyptic number.

221535042130 is a deficient number, since it is larger than the sum of its proper divisors (178084701998).

221535042130 is a wasteful number, since it uses less digits than its factorization.

221535042130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24642.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 221535042130 its reverse (31240535122), we get a palindrome (252775577252).

The spelling of 221535042130 in words is "two hundred twenty-one billion, five hundred thirty-five million, forty-two thousand, one hundred thirty".