123611101 has 2 divisors, whose sum is σ = 123611102. Its totient is φ = 123611100.

The previous prime is 123611099. The next prime is 123611113. The reversal of 123611101 is 101116321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 59691076 = 7995^2 + 7726^2 .

It is a cyclic number.

It is not a de Polignac number, because 123611101 - 2¹ = 123611099 is a prime.

Together with 123611099, 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 (123611141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61805550 + 61805551.

It is an arithmetic number, because the mean of its divisors is an integer number (61805551).

Almost surely, 2^123611101 is an apocalyptic number.

It is an amenable number.

123611101 is a deficient number, since it is larger than the sum of its proper divisors (1).

123611101 is an equidigital number, since it uses as much as digits as its factorization.

123611101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 123611101 is about 11118.0529320560. The cubic root of 123611101 is about 498.1412332014.

Adding to 123611101 its reverse (101116321), we get a palindrome (224727422).

The spelling of 123611101 in words is "one hundred twenty-three million, six hundred eleven thousand, one hundred one".