201072220705 has 16 divisors (see below), whose sum is σ = 251835336144. Its totient is φ = 153973381120.

The previous prime is 201072220703. The next prime is 201072220733. The reversal of 201072220705 is 507022270102.

It can be written as a sum of positive squares in 8 ways, for example, as 7883841681 + 193188379024 = 88791^2 + 439532^2 .

It is not a de Polignac number, because 201072220705 - 2¹ = 201072220703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201072220703) 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, 9242344 + ... + 9264073.

It is an arithmetic number, because the mean of its divisors is an integer number (15739708509).

Almost surely, 2^201072220705 is an apocalyptic number.

It is an amenable number.

201072220705 is a deficient number, since it is larger than the sum of its proper divisors (50763115439).

201072220705 is a wasteful number, since it uses less digits than its factorization.

201072220705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18506516.

The product of its (nonzero) digits is 3920, while the sum is 28.

Adding to 201072220705 its reverse (507022270102), we get a palindrome (708094490807).

The spelling of 201072220705 in words is "two hundred one billion, seventy-two million, two hundred twenty thousand, seven hundred five".