123311101 has 4 divisors (see below), whose sum is σ = 123732252. Its totient is φ = 122889952.

The previous prime is 123311099. The next prime is 123311107. The reversal of 123311101 is 101113321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56235001 + 67076100 = 7499^2 + 8190^2 .

It is a cyclic number.

It is not a de Polignac number, because 123311101 - 2¹ = 123311099 is a prime.

It is a super-4 number, since 4×123311101⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311107) 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, 210136 + ... + 210721.

It is an arithmetic number, because the mean of its divisors is an integer number (30933063).

Almost surely, 2^123311101 is an apocalyptic number.

It is an amenable number.

123311101 is a deficient number, since it is larger than the sum of its proper divisors (421151).

123311101 is an equidigital number, since it uses as much as digits as its factorization.

123311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421150.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 123311101 is about 11104.5531652561. The cubic root of 123311101 is about 497.7379160526.

Adding to 123311101 its reverse (101113321), we get a palindrome (224424422).

The spelling of 123311101 in words is "one hundred twenty-three million, three hundred eleven thousand, one hundred one".