123220001 has 4 divisors (see below), whose sum is σ = 123360432. Its totient is φ = 123079572.

The previous prime is 123219977. The next prime is 123220051. The reversal of 123220001 is 100022321.

It is a happy number.

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: 100022321 = 7 ⋅14288903.

It is a cyclic number.

It is not a de Polignac number, because 123220001 - 2⁶ = 123219937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123220051) 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, 68891 + ... + 70656.

It is an arithmetic number, because the mean of its divisors is an integer number (30840108).

Almost surely, 2^123220001 is an apocalyptic number.

It is an amenable number.

123220001 is a deficient number, since it is larger than the sum of its proper divisors (140431).

123220001 is an equidigital number, since it uses as much as digits as its factorization.

123220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140430.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 123220001 is about 11100.4504863541. The cubic root of 123220001 is about 497.6153126136.

Adding to 123220001 its reverse (100022321), we get a palindrome (223242322).

The spelling of 123220001 in words is "one hundred twenty-three million, two hundred twenty thousand, one".