72030001121 has 4 divisors (see below), whose sum is σ = 77570770452. Its totient is φ = 66489231792.

The previous prime is 72030001103. The next prime is 72030001187. The reversal of 72030001121 is 12110003027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20925069025 + 51104932096 = 144655^2 + 226064^2 .

It is a cyclic number.

It is not a de Polignac number, because 72030001121 - 2¹⁴ = 72029984737 is a prime.

It is a super-2 number, since 2×72030001121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72030001121.

It is not an unprimeable number, because it can be changed into a prime (72030006121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2770384646 + ... + 2770384671.

It is an arithmetic number, because the mean of its divisors is an integer number (19392692613).

Almost surely, 2^72030001121 is an apocalyptic number.

It is an amenable number.

72030001121 is a deficient number, since it is larger than the sum of its proper divisors (5540769331).

72030001121 is a wasteful number, since it uses less digits than its factorization.

72030001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540769330.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 72030001121 its reverse (12110003027), we get a palindrome (84140004148).

The spelling of 72030001121 in words is "seventy-two billion, thirty million, one thousand, one hundred twenty-one".