221011503201 has 12 divisors (see below), whose sum is σ = 336040882320. Its totient is φ = 139586212440.

The previous prime is 221011503143. The next prime is 221011503211. The reversal of 221011503201 is 102305110122.

It is not a de Polignac number, because 221011503201 - 2¹⁰ = 221011502177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221011503211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646232295 + ... + 646232636.

It is an arithmetic number, because the mean of its divisors is an integer number (28003406860).

Almost surely, 2^221011503201 is an apocalyptic number.

It is an amenable number.

221011503201 is a deficient number, since it is larger than the sum of its proper divisors (115029379119).

221011503201 is a wasteful number, since it uses less digits than its factorization.

221011503201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292464956 (or 1292464953 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 221011503201 its reverse (102305110122), we get a palindrome (323316613323).

The spelling of 221011503201 in words is "two hundred twenty-one billion, eleven million, five hundred three thousand, two hundred one".