16120121021610 has 128 divisors (see below), whose sum is σ = 41910389452800. Its totient is φ = 3954312794880.

The previous prime is 16120121021603. The next prime is 16120121021633. The reversal of 16120121021610 is 1612012102161.

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 63 ways as a sum of consecutive naturals, for example, 9576831 + ... + 11133549.

It is an arithmetic number, because the mean of its divisors is an integer number (327424917600).

Almost surely, 2^{16120121021610} is an apocalyptic number.

16120121021610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16120121021610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20955194726400).

16120121021610 is an abundant number, since it is smaller than the sum of its proper divisors (25790268431190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16120121021610 is a wasteful number, since it uses less digits than its factorization.

16120121021610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557276.

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 16120121021610 its reverse (1612012102161), we get a palindrome (17732133123771).

The spelling of 16120121021610 in words is "sixteen trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, six hundred ten".