123432101 has 4 divisors (see below), whose sum is σ = 132926892. Its totient is φ = 113937312.

The previous prime is 123432083. The next prime is 123432103. The reversal of 123432101 is 101234321.

It is a Cunningham number, because it is equal to 11110²+1.

123432101 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101234321 = 4057 ⋅24953.

It can be written as a sum of positive squares in 2 ways, for example, as 18267076 + 105165025 = 4274^2 + 10255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123432101 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123432101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123432103) 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, 4747376 + ... + 4747401.

It is an arithmetic number, because the mean of its divisors is an integer number (33231723).

Almost surely, 2^123432101 is an apocalyptic number.

It is an amenable number.

123432101 is a deficient number, since it is larger than the sum of its proper divisors (9494791).

123432101 is an equidigital number, since it uses as much as digits as its factorization.

123432101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494790.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123432101 is about 11110.0000450045. Note that the first 4 decimals coincide. The cubic root of 123432101 is about 497.9006659292.

Adding to 123432101 its reverse (101234321), we get a palindrome (224666422).

The spelling of 123432101 in words is "one hundred twenty-three million, four hundred thirty-two thousand, one hundred one".