16003020121 has 8 divisors (see below), whose sum is σ = 17480911104. Its totient is φ = 14528974320.

The previous prime is 16003020097. The next prime is 16003020127. The reversal of 16003020121 is 12102030061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16003020121 - 2¹³ = 16003011929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16003020095 and 16003020104.

It is not an unprimeable number, because it can be changed into a prime (16003020127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 952585 + ... + 969238.

It is an arithmetic number, because the mean of its divisors is an integer number (2185113888).

Almost surely, 2^16003020121 is an apocalyptic number.

16003020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16003020121 is a deficient number, since it is larger than the sum of its proper divisors (1477890983).

16003020121 is a wasteful number, since it uses less digits than its factorization.

16003020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922591.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 16003020121 its reverse (12102030061), we get a palindrome (28105050182).

The spelling of 16003020121 in words is "sixteen billion, three million, twenty thousand, one hundred twenty-one".