201440432123 has 6 divisors (see below), whose sum is σ = 234328665996. Its totient is φ = 172663227492.

The previous prime is 201440432119. The next prime is 201440432129. The reversal of 201440432123 is 321234044102.

It is not a de Polignac number, because 201440432123 - 2² = 201440432119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201440432092 and 201440432101.

It is not an unprimeable number, because it can be changed into a prime (201440432129) 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, 2055514565 + ... + 2055514662.

It is an arithmetic number, because the mean of its divisors is an integer number (39054777666).

Almost surely, 2^201440432123 is an apocalyptic number.

201440432123 is a deficient number, since it is larger than the sum of its proper divisors (32888233873).

201440432123 is an equidigital number, since it uses as much as digits as its factorization.

201440432123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111029241 (or 4111029234 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 201440432123 its reverse (321234044102), we get a palindrome (522674476225).

The spelling of 201440432123 in words is "two hundred one billion, four hundred forty million, four hundred thirty-two thousand, one hundred twenty-three".