203421323131 has 4 divisors (see below), whose sum is σ = 219069117232. Its totient is φ = 187773529032.

The previous prime is 203421323101. The next prime is 203421323197. The reversal of 203421323131 is 131323124302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131323124302 = 2 ⋅65661562151.

It is a cyclic number.

It is not a de Polignac number, because 203421323131 - 2¹⁵ = 203421290363 is a prime.

It is a super-2 number, since 2×203421323131² (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 = 203421323096 and 203421323105.

It is not an unprimeable number, because it can be changed into a prime (203421323101) 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, 7823897031 + ... + 7823897056.

It is an arithmetic number, because the mean of its divisors is an integer number (54767279308).

Almost surely, 2^203421323131 is an apocalyptic number.

203421323131 is a deficient number, since it is larger than the sum of its proper divisors (15647794101).

203421323131 is a wasteful number, since it uses less digits than its factorization.

203421323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15647794100.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 203421323131 its reverse (131323124302), we get a palindrome (334744447433).

The spelling of 203421323131 in words is "two hundred three billion, four hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-one".