72121056058459 has 2 divisors, whose sum is σ = 72121056058460. Its totient is φ = 72121056058458.

The previous prime is 72121056058391. The next prime is 72121056058481. The reversal of 72121056058459 is 95485065012127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72121056058459 - 2⁴¹ = 69922032802907 is a prime.

It is not a weakly prime, because it can be changed into another prime (72121056056459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36060528029229 + 36060528029230.

It is an arithmetic number, because the mean of its divisors is an integer number (36060528029230).

Almost surely, 2^{72121056058459} is an apocalyptic number.

72121056058459 is a deficient number, since it is larger than the sum of its proper divisors (1).

72121056058459 is an equidigital number, since it uses as much as digits as its factorization.

72121056058459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 72121056058459 in words is "seventy-two trillion, one hundred twenty-one billion, fifty-six million, fifty-eight thousand, four hundred fifty-nine".