72082602121 has 6 divisors (see below), whose sum is σ = 73325052122. Its totient is φ = 70860859680.

The previous prime is 72082602019. The next prime is 72082602149. The reversal of 72082602121 is 12120628027.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38716465225 + 33366136896 = 196765^2 + 182664^2 .

It is not a de Polignac number, because 72082602121 - 2⁷ = 72082601993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72082602191) 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, 10350240 + ... + 10357201.

Almost surely, 2^72082602121 is an apocalyptic number.

It is an amenable number.

72082602121 is a deficient number, since it is larger than the sum of its proper divisors (1242450001).

72082602121 is an equidigital number, since it uses as much as digits as its factorization.

72082602121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20707559 (or 20707500 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 72082602121 in words is "seventy-two billion, eighty-two million, six hundred two thousand, one hundred twenty-one".