203421311131 has 4 divisors (see below), whose sum is σ = 203467328064. Its totient is φ = 203375294200.

The previous prime is 203421311129. The next prime is 203421311161. The reversal of 203421311131 is 131113124302.

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 203421311131 - 2¹ = 203421311129 is a prime.

It is a super-2 number, since 2×203421311131² (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 (203421311111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23001835 + ... + 23010676.

It is an arithmetic number, because the mean of its divisors is an integer number (50866832016).

Almost surely, 2^203421311131 is an apocalyptic number.

203421311131 is a deficient number, since it is larger than the sum of its proper divisors (46016933).

203421311131 is an equidigital number, since it uses as much as digits as its factorization.

203421311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46016932.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 203421311131 its reverse (131113124302), we get a palindrome (334534435433).

The spelling of 203421311131 in words is "two hundred three billion, four hundred twenty-one million, three hundred eleven thousand, one hundred thirty-one".