123250121 has 4 divisors (see below), whose sum is σ = 125872512. Its totient is φ = 120627732.

The previous prime is 123250111. The next prime is 123250133. The reversal of 123250121 is 121052321.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123250121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123250121.

It is not an unprimeable number, because it can be changed into a prime (123250111) 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, 1311125 + ... + 1311218.

It is an arithmetic number, because the mean of its divisors is an integer number (31468128).

Almost surely, 2^123250121 is an apocalyptic number.

It is an amenable number.

123250121 is a deficient number, since it is larger than the sum of its proper divisors (2622391).

123250121 is an equidigital number, since it uses as much as digits as its factorization.

123250121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622390.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 123250121 is about 11101.8071051518. The cubic root of 123250121 is about 497.6558551446.

The spelling of 123250121 in words is "one hundred twenty-three million, two hundred fifty thousand, one hundred twenty-one".