16897140121 has 9 divisors (see below), whose sum is σ = 17304959829. Its totient is φ = 16498723836.

The previous prime is 16897140053. The next prime is 16897140133. The reversal of 16897140121 is 12104179861.

The square root of 16897140121 is 129989.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 16897140121 - 2¹⁷ = 16897009049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16897149121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5588016 + ... + 5591038.

Almost surely, 2^16897140121 is an apocalyptic number.

16897140121 is the 129989-th square number.

16897140121 is the 64995-th centered octagonal number.

It is an amenable number.

16897140121 is a deficient number, since it is larger than the sum of its proper divisors (407819708).

16897140121 is an frugal number, since it uses more digits than its factorization.

16897140121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132 (or 3066 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 40.

The spelling of 16897140121 in words is "sixteen billion, eight hundred ninety-seven million, one hundred forty thousand, one hundred twenty-one".