160721511701 has 2 divisors, whose sum is σ = 160721511702. Its totient is φ = 160721511700.

The previous prime is 160721511677. The next prime is 160721511703. The reversal of 160721511701 is 107115127061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123219252676 + 37502259025 = 351026^2 + 193655^2 .

It is a cyclic number.

It is not a de Polignac number, because 160721511701 - 2²⁶ = 160654402837 is a prime.

Together with 160721511703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160721511703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80360755850 + 80360755851.

It is an arithmetic number, because the mean of its divisors is an integer number (80360755851).

Almost surely, 2^160721511701 is an apocalyptic number.

It is an amenable number.

160721511701 is a deficient number, since it is larger than the sum of its proper divisors (1).

160721511701 is an equidigital number, since it uses as much as digits as its factorization.

160721511701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 32.

Adding to 160721511701 its reverse (107115127061), we get a palindrome (267836638762).

The spelling of 160721511701 in words is "one hundred sixty billion, seven hundred twenty-one million, five hundred eleven thousand, seven hundred one".