123001221 has 24 divisors (see below), whose sum is σ = 191328480. Its totient is φ = 70083552.

The previous prime is 123001187. The next prime is 123001223. The reversal of 123001221 is 122100321.

It is not a de Polignac number, because 123001221 - 2⁶ = 123001157 is a prime.

123001221 is a modest number, since divided by 1221 gives 123 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 123001197 and 123001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123001223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60595 + ... + 62591.

It is an arithmetic number, because the mean of its divisors is an integer number (7972020).

Almost surely, 2^123001221 is an apocalyptic number.

It is an amenable number.

123001221 is a deficient number, since it is larger than the sum of its proper divisors (68327259).

123001221 is a wasteful number, since it uses less digits than its factorization.

123001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2426 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123001221 is about 11090.5915532040. The cubic root of 123001221 is about 497.3206289216.

Adding to 123001221 its reverse (122100321), we get a palindrome (245101542).

The spelling of 123001221 in words is "one hundred twenty-three million, one thousand, two hundred twenty-one".