16120121021612 has 24 divisors (see below), whose sum is σ = 29869763895216. Its totient is φ = 7585906825728.

The previous prime is 16120121021603. The next prime is 16120121021633. The reversal of 16120121021612 is 21612012102161.

It is a happy number.

It is a super-2 number, since 2×16120121021612² (a number of 27 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 24453443 + ... + 25104005.

It is an arithmetic number, because the mean of its divisors is an integer number (1244573495634).

Almost surely, 2^{16120121021612} is an apocalyptic number.

It is an amenable number.

16120121021612 is a deficient number, since it is larger than the sum of its proper divisors (13749642873604).

16120121021612 is a wasteful number, since it uses less digits than its factorization.

16120121021612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014977 (or 1014975 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 16120121021612 its reverse (21612012102161), we get a palindrome (37732133123773).

The spelling of 16120121021612 in words is "sixteen trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, six hundred twelve".