123121201 has 4 divisors (see below), whose sum is σ = 140709952. Its totient is φ = 105532452.

The previous prime is 123121189. The next prime is 123121217. The reversal of 123121201 is 102121321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102121321 = 3677 ⋅27773.

It is a cyclic number.

It is not a de Polignac number, because 123121201 - 2¹⁷ = 122990129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121261) 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, 8794365 + ... + 8794378.

It is an arithmetic number, because the mean of its divisors is an integer number (35177488).

Almost surely, 2^123121201 is an apocalyptic number.

It is an amenable number.

123121201 is a deficient number, since it is larger than the sum of its proper divisors (17588751).

123121201 is an equidigital number, since it uses as much as digits as its factorization.

123121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17588750.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123121201 is about 11095.9993240807. Note that the first 3 decimals coincide. The cubic root of 123121201 is about 497.4822780991.

Adding to 123121201 its reverse (102121321), we get a palindrome (225242522).

It can be divided in two parts, 12 and 3121201, that added together give a palindrome (3121213).

The spelling of 123121201 in words is "one hundred twenty-three million, one hundred twenty-one thousand, two hundred one".