123641101 has 2 divisors, whose sum is σ = 123641102. Its totient is φ = 123641100.

The previous prime is 123641099. The next prime is 123641129. The reversal of 123641101 is 101146321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122877225 + 763876 = 11085^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 123641101 - 2¹ = 123641099 is a prime.

Together with 123641099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123641131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61820550 + 61820551.

It is an arithmetic number, because the mean of its divisors is an integer number (61820551).

Almost surely, 2^123641101 is an apocalyptic number.

It is an amenable number.

123641101 is a deficient number, since it is larger than the sum of its proper divisors (1).

123641101 is an equidigital number, since it uses as much as digits as its factorization.

123641101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 123641101 is about 11119.4020073024. The cubic root of 123641101 is about 498.1815290110.

Adding to 123641101 its reverse (101146321), we get a palindrome (224787422).

The spelling of 123641101 in words is "one hundred twenty-three million, six hundred forty-one thousand, one hundred one".