123001010212121 has 4 divisors (see below), whose sum is σ = 123070228565172. Its totient is φ = 122931791859072.

The previous prime is 123001010212019. The next prime is 123001010212123. The reversal of 123001010212121 is 121212010100321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35278848160000 + 87722162052121 = 5939600^2 + 9366011^2 .

It is a cyclic number.

It is not a de Polignac number, because 123001010212121 - 2³⁴ = 122983830342937 is a prime.

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 123001010212121.

It is not an unprimeable number, because it can be changed into a prime (123001010212123) 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, 34609173860 + ... + 34609177413.

It is an arithmetic number, because the mean of its divisors is an integer number (30767557141293).

Almost surely, 2^{123001010212121} is an apocalyptic number.

It is an amenable number.

123001010212121 is a deficient number, since it is larger than the sum of its proper divisors (69218353051).

123001010212121 is an equidigital number, since it uses as much as digits as its factorization.

123001010212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69218353050.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 123001010212121 its reverse (121212010100321), we get a palindrome (244213020312442).

The spelling of 123001010212121 in words is "one hundred twenty-three trillion, one billion, ten million, two hundred twelve thousand, one hundred twenty-one".