221121432010 has 8 divisors (see below), whose sum is σ = 398018577636. Its totient is φ = 88448572800.

The previous prime is 221121432001. The next prime is 221121432011. The reversal of 221121432010 is 10234121122.

It can be written as a sum of positive squares in 2 ways, for example, as 188480144449 + 32641287561 = 434143^2 + 180669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (221121432011) 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 3 ways as a sum of consecutive naturals, for example, 11056071591 + ... + 11056071610.

Almost surely, 2^221121432010 is an apocalyptic number.

221121432010 is a deficient number, since it is larger than the sum of its proper divisors (176897145626).

221121432010 is a wasteful number, since it uses less digits than its factorization.

221121432010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22112143208.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221121432010 its reverse (10234121122), we get a palindrome (231355553132).

The spelling of 221121432010 in words is "two hundred twenty-one billion, one hundred twenty-one million, four hundred thirty-two thousand, ten".