2199038572081 has 16 divisors (see below), whose sum is σ = 2389278974544. Its totient is φ = 2011812009984.

The previous prime is 2199038572067. The next prime is 2199038572097. The reversal of 2199038572081 is 1802758309912.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 459385728400 + 1739652843681 = 677780^2 + 1318959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2199038572081 - 2¹⁷ = 2199038441009 is a prime.

It is a super-2 number, since 2×2199038572081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2199038572021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46274725 + ... + 46322221.

It is an arithmetic number, because the mean of its divisors is an integer number (149329935909).

Almost surely, 2^{2199038572081} is an apocalyptic number.

It is an amenable number.

2199038572081 is a deficient number, since it is larger than the sum of its proper divisors (190240402463).

2199038572081 is a wasteful number, since it uses less digits than its factorization.

2199038572081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79140.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 2199038572081 in words is "two trillion, one hundred ninety-nine billion, thirty-eight million, five hundred seventy-two thousand, eighty-one".