10121220123 has 32 divisors (see below), whose sum is σ = 15966836736. Its totient is φ = 5582919168.

The previous prime is 10121220097. The next prime is 10121220133. The reversal of 10121220123 is 32102212101.

It is not a de Polignac number, because 10121220123 - 2⁶ = 10121220059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10121220133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1815 + ... + 142287.

It is an arithmetic number, because the mean of its divisors is an integer number (498963648).

Almost surely, 2^10121220123 is an apocalyptic number.

10121220123 is a deficient number, since it is larger than the sum of its proper divisors (5845616613).

10121220123 is a wasteful number, since it uses less digits than its factorization.

10121220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140603.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 10121220123 its reverse (32102212101), we get a palindrome (42223432224).

The spelling of 10121220123 in words is "ten billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-three".