202122605423 has 4 divisors (see below), whose sum is σ = 202178091528. Its totient is φ = 202067119320.

The previous prime is 202122605417. The next prime is 202122605431. The reversal of 202122605423 is 324506221202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324506221202 = 2 ⋅162253110601.

It is a cyclic number.

It is not a de Polignac number, because 202122605423 - 2¹² = 202122601327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122605453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27737588 + ... + 27744873.

It is an arithmetic number, because the mean of its divisors is an integer number (50544522882).

Almost surely, 2^202122605423 is an apocalyptic number.

202122605423 is a deficient number, since it is larger than the sum of its proper divisors (55486105).

202122605423 is an equidigital number, since it uses as much as digits as its factorization.

202122605423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55486104.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 202122605423 its reverse (324506221202), we get a palindrome (526628826625).

The spelling of 202122605423 in words is "two hundred two billion, one hundred twenty-two million, six hundred five thousand, four hundred twenty-three".