160121820 has 72 divisors (see below), whose sum is σ = 463437072. Its totient is φ = 41306880.

The previous prime is 160121803. The next prime is 160121821. The reversal of 160121820 is 28121061.

160121820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×160121820² = 51277994480224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160121821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56272 + ... + 59048.

It is an arithmetic number, because the mean of its divisors is an integer number (6436626).

Almost surely, 2^160121820 is an apocalyptic number.

160121820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 160121820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231718536).

160121820 is an abundant number, since it is smaller than the sum of its proper divisors (303315252).

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

160121820 is a wasteful number, since it uses less digits than its factorization.

160121820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 160121820 is about 12653.9250827559. The cubic root of 160121820 is about 543.0212676807.

Adding to 160121820 its reverse (28121061), we get a palindrome (188242881).

The spelling of 160121820 in words is "one hundred sixty million, one hundred twenty-one thousand, eight hundred twenty".