202111443423 has 6 divisors (see below), whose sum is σ = 291938751624. Its totient is φ = 134740962276.

The previous prime is 202111443397. The next prime is 202111443427. The reversal of 202111443423 is 324344111202.

202111443423 is a `hidden beast` number, since 2 + 0 + 211 + 1 + 443 + 4 + 2 + 3 = 666.

It is not a de Polignac number, because 202111443423 - 2¹⁰ = 202111442399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202111443427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11228413515 + ... + 11228413532.

It is an arithmetic number, because the mean of its divisors is an integer number (48656458604).

Almost surely, 2^202111443423 is an apocalyptic number.

202111443423 is a deficient number, since it is larger than the sum of its proper divisors (89827308201).

202111443423 is a wasteful number, since it uses less digits than its factorization.

202111443423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22456827053 (or 22456827050 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 202111443423 its reverse (324344111202), we get a palindrome (526455554625).

The spelling of 202111443423 in words is "two hundred two billion, one hundred eleven million, four hundred forty-three thousand, four hundred twenty-three".