201277750443121 has 9 divisors (see below), whose sum is σ = 221239351775883. Its totient is φ = 182979631257720.

The previous prime is 201277750443109. The next prime is 201277750443139. The reversal of 201277750443121 is 121344057772102.

The square root of 201277750443121 is 14187239.

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., 133834565178721 + 67443185264400 = 11568689^2 + 8212380^2 .

It is not a de Polignac number, because 201277750443121 - 2¹¹ = 201277750441073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201277750443101) 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, 155414755 + ... + 156704503.

Almost surely, 2^{201277750443121} is an apocalyptic number.

201277750443121 is the 14187239-th square number.

201277750443121 is the 7093620-th centered octagonal number.

It is an amenable number.

201277750443121 is a deficient number, since it is larger than the sum of its proper divisors (19961601332762).

201277750443121 is an frugal number, since it uses more digits than its factorization.

201277750443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579520 (or 1289760 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 46.

The spelling of 201277750443121 in words is "two hundred one trillion, two hundred seventy-seven billion, seven hundred fifty million, four hundred forty-three thousand, one hundred twenty-one".