100320120121 has 16 divisors (see below), whose sum is σ = 110443576320. Its totient is φ = 90556894080.

The previous prime is 100320120101. The next prime is 100320120139. The reversal of 100320120121 is 121021023001.

It is a cyclic number.

It is not a de Polignac number, because 100320120121 - 2⁹ = 100320119609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100320120101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195900 + ... + 488893.

It is an arithmetic number, because the mean of its divisors is an integer number (6902723520).

Almost surely, 2^100320120121 is an apocalyptic number.

It is an amenable number.

100320120121 is a deficient number, since it is larger than the sum of its proper divisors (10123456199).

100320120121 is a wasteful number, since it uses less digits than its factorization.

100320120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685056.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100320120121 its reverse (121021023001), we get a palindrome (221341143122).

The spelling of 100320120121 in words is "one hundred billion, three hundred twenty million, one hundred twenty thousand, one hundred twenty-one".