160621743021 has 4 divisors (see below), whose sum is σ = 214162324032. Its totient is φ = 107081162012.

The previous prime is 160621743011. The next prime is 160621743047. The reversal of 160621743021 is 120347126061.

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 160621743021 - 2⁷ = 160621742893 is a prime.

It is a super-2 number, since 2×160621743021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160621743011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26770290501 + ... + 26770290506.

It is an arithmetic number, because the mean of its divisors is an integer number (53540581008).

Almost surely, 2^160621743021 is an apocalyptic number.

It is an amenable number.

160621743021 is a deficient number, since it is larger than the sum of its proper divisors (53540581011).

160621743021 is an equidigital number, since it uses as much as digits as its factorization.

160621743021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53540581010.

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 160621743021 its reverse (120347126061), we get a palindrome (280968869082).

The spelling of 160621743021 in words is "one hundred sixty billion, six hundred twenty-one million, seven hundred forty-three thousand, twenty-one".