221121130233 has 16 divisors (see below), whose sum is σ = 298099569600. Its totient is φ = 145783166976.

The previous prime is 221121130207. The next prime is 221121130273. The reversal of 221121130233 is 332031121122.

It is not a de Polignac number, because 221121130233 - 2⁶ = 221121130169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221121130273) 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, 411708 + ... + 782141.

It is an arithmetic number, because the mean of its divisors is an integer number (18631223100).

Almost surely, 2^221121130233 is an apocalyptic number.

It is an amenable number.

221121130233 is a deficient number, since it is larger than the sum of its proper divisors (76978439367).

221121130233 is a wasteful number, since it uses less digits than its factorization.

221121130233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194536.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221121130233 its reverse (332031121122), we get a palindrome (553152251355).

The spelling of 221121130233 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred thirty thousand, two hundred thirty-three".