16121653201 has 8 divisors (see below), whose sum is σ = 16159156200. Its totient is φ = 16084174080.

The previous prime is 16121653183. The next prime is 16121653211. The reversal of 16121653201 is 10235612161.

It can be written as a sum of positive squares in 4 ways, for example, as 6134648976 + 9987004225 = 78324^2 + 99935^2 .

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 16121653201 - 2¹⁷ = 16121522129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16121653201.

It is not an unprimeable number, because it can be changed into a prime (16121653211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2399635 + ... + 2406343.

It is an arithmetic number, because the mean of its divisors is an integer number (2019894525).

Almost surely, 2^16121653201 is an apocalyptic number.

It is an amenable number.

16121653201 is a deficient number, since it is larger than the sum of its proper divisors (37502999).

16121653201 is an equidigital number, since it uses as much as digits as its factorization.

16121653201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11939.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 16121653201 in words is "sixteen billion, one hundred twenty-one million, six hundred fifty-three thousand, two hundred one".