123201001 has 16 divisors (see below), whose sum is σ = 154349568. Its totient is φ = 95533200.

The previous prime is 123200999. The next prime is 123201011. The reversal of 123201001 is 100102321.

It is not a de Polignac number, because 123201001 - 2¹ = 123200999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123201011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12456 + ... + 20038.

It is an arithmetic number, because the mean of its divisors is an integer number (9646848).

Almost surely, 2^123201001 is an apocalyptic number.

123201001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123201001 is a deficient number, since it is larger than the sum of its proper divisors (31148567).

123201001 is a wasteful number, since it uses less digits than its factorization.

123201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7812.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 123201001 is about 11099.5946322377. The cubic root of 123201001 is about 497.5897345774.

Adding to 123201001 its reverse (100102321), we get a palindrome (223303322).

The spelling of 123201001 in words is "one hundred twenty-three million, two hundred one thousand, one".