203120111221 has 8 divisors (see below), whose sum is σ = 206722926144. Its totient is φ = 199539468000.

The previous prime is 203120111219. The next prime is 203120111239. The reversal of 203120111221 is 122111021302.

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

It is a cyclic number.

It is not a de Polignac number, because 203120111221 - 2¹ = 203120111219 is a prime.

It is a super-2 number, since 2×203120111221² (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 = 203120111195 and 203120111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203120111261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5524441 + ... + 5561086.

It is an arithmetic number, because the mean of its divisors is an integer number (25840365768).

Almost surely, 2^203120111221 is an apocalyptic number.

It is an amenable number.

203120111221 is a deficient number, since it is larger than the sum of its proper divisors (3602814923).

203120111221 is a wasteful number, since it uses less digits than its factorization.

203120111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11085851.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 203120111221 its reverse (122111021302), we get a palindrome (325231132523).

The spelling of 203120111221 in words is "two hundred three billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".