16200121045 has 4 divisors (see below), whose sum is σ = 19440145260. Its totient is φ = 12960096832.

The previous prime is 16200121037. The next prime is 16200121051. The reversal of 16200121045 is 54012100261.

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 12574033956 + 3626087089 = 112134^2 + 60217^2 .

It is a cyclic number.

It is not a de Polignac number, because 16200121045 - 2³ = 16200121037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620012100 + ... + 1620012109.

It is an arithmetic number, because the mean of its divisors is an integer number (4860036315).

Almost surely, 2^16200121045 is an apocalyptic number.

It is an amenable number.

16200121045 is a deficient number, since it is larger than the sum of its proper divisors (3240024215).

16200121045 is an equidigital number, since it uses as much as digits as its factorization.

16200121045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240024214.

The product of its (nonzero) digits is 480, while the sum is 22.

The spelling of 16200121045 in words is "sixteen billion, two hundred million, one hundred twenty-one thousand, forty-five".