203021221131 has 6 divisors (see below), whose sum is σ = 293252874980. Its totient is φ = 135347480748.

The previous prime is 203021221111. The next prime is 203021221157. The reversal of 203021221131 is 131122120302.

203021221131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203021221131 - 2¹⁰ = 203021220107 is a prime.

It is a super-2 number, since 2×203021221131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203021221111) 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 5 ways as a sum of consecutive naturals, for example, 11278956721 + ... + 11278956738.

Almost surely, 2^203021221131 is an apocalyptic number.

203021221131 is a deficient number, since it is larger than the sum of its proper divisors (90231653849).

203021221131 is a wasteful number, since it uses less digits than its factorization.

203021221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22557913465 (or 22557913462 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 203021221131 its reverse (131122120302), we get a palindrome (334143341433).

The spelling of 203021221131 in words is "two hundred three billion, twenty-one million, two hundred twenty-one thousand, one hundred thirty-one".