16120121021611 has 8 divisors (see below), whose sum is σ = 16301846181600. Its totient is φ = 15938409199680.

The previous prime is 16120121021603. The next prime is 16120121021633. The reversal of 16120121021611 is 11612012102161.

It is a happy number.

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 16120121021611 - 2³ = 16120121021603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16120121021671) 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, 893716 + ... + 5747953.

It is an arithmetic number, because the mean of its divisors is an integer number (2037730772700).

Almost surely, 2^{16120121021611} is an apocalyptic number.

16120121021611 is a deficient number, since it is larger than the sum of its proper divisors (181725159989).

16120121021611 is an equidigital number, since it uses as much as digits as its factorization.

16120121021611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669029.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 16120121021611 its reverse (11612012102161), we get a palindrome (27732133123772).

The spelling of 16120121021611 in words is "sixteen trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, six hundred eleven".