2080261020721 has 9 divisors (see below), whose sum is σ = 2252610639531. Its totient is φ = 1920223634472.

The previous prime is 2080261020713. The next prime is 2080261020731. The reversal of 2080261020721 is 1270201620802.

It is a happy number.

The square root of 2080261020721 is 1442311.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 307730920225 + 1772530100496 = 554735^2 + 1331364^2 .

It is not a de Polignac number, because 2080261020721 - 2³ = 2080261020713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2080261020731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18694570 + ... + 18805516.

It is an arithmetic number, because the mean of its divisors is an integer number (250290071059).

Almost surely, 2^{2080261020721} is an apocalyptic number.

2080261020721 is the 1442311-st square number.

2080261020721 is the 721156-th centered octagonal number.

It is an amenable number.

2080261020721 is a deficient number, since it is larger than the sum of its proper divisors (172349618810).

2080261020721 is an frugal number, since it uses more digits than its factorization.

2080261020721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221920 (or 110960 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 2080261020721 in words is "two trillion, eighty billion, two hundred sixty-one million, twenty thousand, seven hundred twenty-one".