2020124958721 has 9 divisors (see below), whose sum is σ = 2033987065411. Its totient is φ = 2006356719064.

The previous prime is 2020124958703. The next prime is 2020124958739. The reversal of 2020124958721 is 1278594210202.

The square root of 2020124958721 is 1421311.

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

It is an interprime number because it is at equal distance from previous prime (2020124958703) and next prime (2020124958739).

It can be written as a sum of positive squares in only one way, i.e., 236671547121 + 1783453411600 = 486489^2 + 1335460^2 .

It is not a de Polignac number, because 2020124958721 - 2³³ = 2011535024129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020124958421) 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, 211770570 + ... + 211780108.

Almost surely, 2^{2020124958721} is an apocalyptic number.

2020124958721 is the 1421311-st square number.

2020124958721 is the 710656-th centered octagonal number.

It is an amenable number.

2020124958721 is a deficient number, since it is larger than the sum of its proper divisors (13862106690).

2020124958721 is an frugal number, since it uses more digits than its factorization.

2020124958721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19376 (or 9688 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 2020124958721 in words is "two trillion, twenty billion, one hundred twenty-four million, nine hundred fifty-eight thousand, seven hundred twenty-one".