221200203031 has 4 divisors (see below), whose sum is σ = 232842319000. Its totient is φ = 209558087064.

The previous prime is 221200203001. The next prime is 221200203041. The reversal of 221200203031 is 130302002122.

221200203031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221200203031 - 2¹⁵ = 221200170263 is a prime.

It is a super-2 number, since 2×221200203031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200202996 and 221200203014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200203001) 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 in 3 ways as a sum of consecutive naturals, for example, 5821057956 + ... + 5821057993.

It is an arithmetic number, because the mean of its divisors is an integer number (58210579750).

Almost surely, 2^221200203031 is an apocalyptic number.

221200203031 is a deficient number, since it is larger than the sum of its proper divisors (11642115969).

221200203031 is a wasteful number, since it uses less digits than its factorization.

221200203031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11642115968.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 221200203031 its reverse (130302002122), we get a palindrome (351502205153).

The spelling of 221200203031 in words is "two hundred twenty-one billion, two hundred million, two hundred three thousand, thirty-one".