160121021 has 4 divisors (see below), whose sum is σ = 160482912. Its totient is φ = 159759132.

The previous prime is 160120981. The next prime is 160121029. The reversal of 160121021 is 120121061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 160121021 - 2⁶ = 160120957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 160120987 and 160121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160121029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180281 + ... + 181166.

It is an arithmetic number, because the mean of its divisors is an integer number (40120728).

Almost surely, 2^160121021 is an apocalyptic number.

It is an amenable number.

160121021 is a deficient number, since it is larger than the sum of its proper divisors (361891).

160121021 is an equidigital number, since it uses as much as digits as its factorization.

160121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361890.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 160121021 is about 12653.8935114849. The cubic root of 160121021 is about 543.0203644627.

Adding to 160121021 its reverse (120121061), we get a palindrome (280242082).

It can be divided in two parts, 1601 and 21021, that added together give a palindrome (22622).

The spelling of 160121021 in words is "one hundred sixty million, one hundred twenty-one thousand, twenty-one".