2121725575773 has 6 divisors (see below), whose sum is σ = 3064714720574. Its totient is φ = 1414483717176.

The previous prime is 2121725575759. The next prime is 2121725575807. The reversal of 2121725575773 is 3775755271212.

2121725575773 is a `hidden beast` number, since 2 + 1 + 2 + 17 + 2 + 5 + 57 + 577 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1206071793369 + 915653782404 = 1098213^2 + 956898^2 .

It is not a de Polignac number, because 2121725575773 - 2¹³ = 2121725567581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121725575273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117873643090 + ... + 117873643107.

Almost surely, 2^{2121725575773} is an apocalyptic number.

It is an amenable number.

2121725575773 is a deficient number, since it is larger than the sum of its proper divisors (942989144801).

2121725575773 is a wasteful number, since it uses less digits than its factorization.

2121725575773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235747286203 (or 235747286200 counting only the distinct ones).

The product of its digits is 7203000, while the sum is 54.

The spelling of 2121725575773 in words is "two trillion, one hundred twenty-one billion, seven hundred twenty-five million, five hundred seventy-five thousand, seven hundred seventy-three".