123101001 has 12 divisors (see below), whose sum is σ = 177914880. Its totient is φ = 82020120.

The previous prime is 123100993. The next prime is 123101009. The reversal of 123101001 is 100101321.

It is an interprime number because it is at equal distance from previous prime (123100993) and next prime (123101009).

It is not a de Polignac number, because 123101001 - 2³ = 123100993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123101009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20680 + ... + 25958.

It is an arithmetic number, because the mean of its divisors is an integer number (14826240).

Almost surely, 2^123101001 is an apocalyptic number.

It is an amenable number.

123101001 is a deficient number, since it is larger than the sum of its proper divisors (54813879).

123101001 is a wasteful number, since it uses less digits than its factorization.

123101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876 (or 7873 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 123101001 is about 11095.0890487639. The cubic root of 123101001 is about 497.4550699725.

Adding to 123101001 its reverse (100101321), we get a palindrome (223202322).

It can be divided in two parts, 123 and 101001, that added together give a square (101124 = 318²).

The spelling of 123101001 in words is "one hundred twenty-three million, one hundred one thousand, one".