2021161079 has 4 divisors (see below), whose sum is σ = 2309898384. Its totient is φ = 1732423776.

The previous prime is 2021161067. The next prime is 2021161111. The reversal of 2021161079 is 9701611202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021161079 - 2¹² = 2021156983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021161579) 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, 144368642 + ... + 144368655.

It is an arithmetic number, because the mean of its divisors is an integer number (577474596).

Almost surely, 2^2021161079 is an apocalyptic number.

2021161079 is a deficient number, since it is larger than the sum of its proper divisors (288737305).

2021161079 is an equidigital number, since it uses as much as digits as its factorization.

2021161079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288737304.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 2021161079 is about 44957.3250872425. The cubic root of 2021161079 is about 1264.3490178025.

The spelling of 2021161079 in words is "two billion, twenty-one million, one hundred sixty-one thousand, seventy-nine".