202423421131 has 4 divisors (see below), whose sum is σ = 202428421000. Its totient is φ = 202418421264.

The previous prime is 202423421129. The next prime is 202423421143. The reversal of 202423421131 is 131124324202.

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 202423421131 - 2¹ = 202423421129 is a prime.

It is a super-2 number, since 2×202423421131² (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 = 202423421096 and 202423421105.

It is not an unprimeable number, because it can be changed into a prime (202423421531) 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, 2438706 + ... + 2520343.

It is an arithmetic number, because the mean of its divisors is an integer number (50607105250).

Almost surely, 2^202423421131 is an apocalyptic number.

202423421131 is a deficient number, since it is larger than the sum of its proper divisors (4999869).

202423421131 is an equidigital number, since it uses as much as digits as its factorization.

202423421131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999868.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 202423421131 its reverse (131124324202), we get a palindrome (333547745333).

The spelling of 202423421131 in words is "two hundred two billion, four hundred twenty-three million, four hundred twenty-one thousand, one hundred thirty-one".